diff --git a/builder/tools-builtin.go b/builder/tools-builtin.go
index 29dfa861..e5ecd424 100644
--- a/builder/tools-builtin.go
+++ b/builder/tools-builtin.go
@@ -1,3 +1,4 @@
+//go:build byollvm
 // +build byollvm
 
 package builder
diff --git a/builder/tools-external.go b/builder/tools-external.go
index 4955bd2c..b2af00fb 100644
--- a/builder/tools-external.go
+++ b/builder/tools-external.go
@@ -1,3 +1,4 @@
+//go:build !byollvm
 // +build !byollvm
 
 package builder
diff --git a/src/device/arm/scb.go b/src/device/arm/scb.go
index c3d782e0..007ecec9 100644
--- a/src/device/arm/scb.go
+++ b/src/device/arm/scb.go
@@ -1,6 +1,7 @@
 // Hand created file. DO NOT DELETE.
 // Cortex-M System Control Block-related definitions.
 
+//go:build cortexm
 // +build cortexm
 
 package arm
diff --git a/src/examples/can/feather-m4-can.go b/src/examples/can/feather-m4-can.go
index e60552a4..a97099ca 100644
--- a/src/examples/can/feather-m4-can.go
+++ b/src/examples/can/feather-m4-can.go
@@ -1,3 +1,4 @@
+//go:build feather_m4_can
 // +build feather_m4_can
 
 package main
diff --git a/src/examples/caninterrupt/feather-m4-can.go b/src/examples/caninterrupt/feather-m4-can.go
index e60552a4..a97099ca 100644
--- a/src/examples/caninterrupt/feather-m4-can.go
+++ b/src/examples/caninterrupt/feather-m4-can.go
@@ -1,3 +1,4 @@
+//go:build feather_m4_can
 // +build feather_m4_can
 
 package main
diff --git a/src/examples/dac/circuitplay_express.go b/src/examples/dac/circuitplay_express.go
index 386135ab..6ca853e7 100644
--- a/src/examples/dac/circuitplay_express.go
+++ b/src/examples/dac/circuitplay_express.go
@@ -1,3 +1,4 @@
+//go:build circuitplay_express
 // +build circuitplay_express
 
 package main
diff --git a/src/examples/dac/pyportal.go b/src/examples/dac/pyportal.go
index 0e014d50..31f37c12 100644
--- a/src/examples/dac/pyportal.go
+++ b/src/examples/dac/pyportal.go
@@ -1,3 +1,4 @@
+//go:build pyportal
 // +build pyportal
 
 package main
diff --git a/src/examples/pininterrupt/circuitplay-express.go b/src/examples/pininterrupt/circuitplay-express.go
index e37105c2..743bf99e 100644
--- a/src/examples/pininterrupt/circuitplay-express.go
+++ b/src/examples/pininterrupt/circuitplay-express.go
@@ -1,3 +1,4 @@
+//go:build circuitplay_express
 // +build circuitplay_express
 
 package main
diff --git a/src/examples/pininterrupt/pca10040.go b/src/examples/pininterrupt/pca10040.go
index 82825274..db169ced 100644
--- a/src/examples/pininterrupt/pca10040.go
+++ b/src/examples/pininterrupt/pca10040.go
@@ -1,3 +1,4 @@
+//go:build pca10040
 // +build pca10040
 
 package main
diff --git a/src/examples/pininterrupt/stm32.go b/src/examples/pininterrupt/stm32.go
index 30a86313..a9047f2c 100644
--- a/src/examples/pininterrupt/stm32.go
+++ b/src/examples/pininterrupt/stm32.go
@@ -1,3 +1,4 @@
+//go:build stm32
 // +build stm32
 
 package main
diff --git a/src/examples/pininterrupt/wioterminal.go b/src/examples/pininterrupt/wioterminal.go
index a9fbfc84..9a98b15b 100644
--- a/src/examples/pininterrupt/wioterminal.go
+++ b/src/examples/pininterrupt/wioterminal.go
@@ -1,3 +1,4 @@
+//go:build wioterminal
 // +build wioterminal
 
 package main
diff --git a/src/examples/pwm/arduino-mega1280.go b/src/examples/pwm/arduino-mega1280.go
index 824d2bda..2cf5d836 100644
--- a/src/examples/pwm/arduino-mega1280.go
+++ b/src/examples/pwm/arduino-mega1280.go
@@ -1,3 +1,4 @@
+//go:build arduino_mega1280
 // +build arduino_mega1280
 
 package main
diff --git a/src/examples/pwm/arduino.go b/src/examples/pwm/arduino.go
index f6739b5f..3186bf4e 100644
--- a/src/examples/pwm/arduino.go
+++ b/src/examples/pwm/arduino.go
@@ -1,3 +1,4 @@
+//go:build arduino
 // +build arduino
 
 package main
diff --git a/src/examples/pwm/bluepill.go b/src/examples/pwm/bluepill.go
index b8fe1c7e..e676f58f 100644
--- a/src/examples/pwm/bluepill.go
+++ b/src/examples/pwm/bluepill.go
@@ -1,3 +1,4 @@
+//go:build bluepill
 // +build bluepill
 
 package main
diff --git a/src/examples/pwm/feather-m4.go b/src/examples/pwm/feather-m4.go
index 1c77be8b..c00539b9 100644
--- a/src/examples/pwm/feather-m4.go
+++ b/src/examples/pwm/feather-m4.go
@@ -1,3 +1,4 @@
+//go:build feather_m4
 // +build feather_m4
 
 package main
diff --git a/src/examples/pwm/itsybitsy-m0.go b/src/examples/pwm/itsybitsy-m0.go
index c0b2f7d7..fe401e8c 100644
--- a/src/examples/pwm/itsybitsy-m0.go
+++ b/src/examples/pwm/itsybitsy-m0.go
@@ -1,3 +1,4 @@
+//go:build itsybitsy_m0
 // +build itsybitsy_m0
 
 package main
diff --git a/src/examples/pwm/itsybitsy-m4.go b/src/examples/pwm/itsybitsy-m4.go
index 1e13f9ef..5926fb1b 100644
--- a/src/examples/pwm/itsybitsy-m4.go
+++ b/src/examples/pwm/itsybitsy-m4.go
@@ -1,3 +1,4 @@
+//go:build itsybitsy_m4
 // +build itsybitsy_m4
 
 package main
diff --git a/src/examples/pwm/nucleo-f722ze.go b/src/examples/pwm/nucleo-f722ze.go
index fdd0f67f..b23816d0 100644
--- a/src/examples/pwm/nucleo-f722ze.go
+++ b/src/examples/pwm/nucleo-f722ze.go
@@ -1,3 +1,4 @@
+//go:build stm32f7
 // +build stm32f7
 
 package main
diff --git a/src/examples/pwm/nucleo-l031k6.go b/src/examples/pwm/nucleo-l031k6.go
index 59f32c17..6de19f88 100644
--- a/src/examples/pwm/nucleo-l031k6.go
+++ b/src/examples/pwm/nucleo-l031k6.go
@@ -1,3 +1,4 @@
+//go:build stm32l0
 // +build stm32l0
 
 package main
diff --git a/src/examples/pwm/nucleo-l432kc.go b/src/examples/pwm/nucleo-l432kc.go
index 09298e81..0663541f 100644
--- a/src/examples/pwm/nucleo-l432kc.go
+++ b/src/examples/pwm/nucleo-l432kc.go
@@ -1,3 +1,4 @@
+//go:build stm32l4
 // +build stm32l4
 
 package main
diff --git a/src/examples/pwm/nucleo-l552ze.go b/src/examples/pwm/nucleo-l552ze.go
index 7ae31dc3..d09557a7 100644
--- a/src/examples/pwm/nucleo-l552ze.go
+++ b/src/examples/pwm/nucleo-l552ze.go
@@ -1,3 +1,4 @@
+//go:build stm32l5
 // +build stm32l5
 
 package main
diff --git a/src/examples/pwm/pico.go b/src/examples/pwm/pico.go
index 0c0c0a83..87c592a4 100644
--- a/src/examples/pwm/pico.go
+++ b/src/examples/pwm/pico.go
@@ -1,3 +1,4 @@
+//go:build pico
 // +build pico
 
 package main
diff --git a/src/examples/pwm/stm32f4disco.go b/src/examples/pwm/stm32f4disco.go
index baa34e99..87b30c82 100644
--- a/src/examples/pwm/stm32f4disco.go
+++ b/src/examples/pwm/stm32f4disco.go
@@ -1,3 +1,4 @@
+//go:build stm32f4disco
 // +build stm32f4disco
 
 package main
diff --git a/src/machine/board_arduino.go b/src/machine/board_arduino.go
index 001ba9c7..e78153f1 100644
--- a/src/machine/board_arduino.go
+++ b/src/machine/board_arduino.go
@@ -1,3 +1,4 @@
+//go:build arduino
 // +build arduino
 
 package machine
diff --git a/src/machine/board_arduino_mega1280.go b/src/machine/board_arduino_mega1280.go
index 289b55b2..961fcec2 100644
--- a/src/machine/board_arduino_mega1280.go
+++ b/src/machine/board_arduino_mega1280.go
@@ -1,3 +1,4 @@
+//go:build arduino_mega1280
 // +build arduino_mega1280
 
 package machine
diff --git a/src/machine/board_arduino_mega2560.go b/src/machine/board_arduino_mega2560.go
index c6370139..f47504bd 100644
--- a/src/machine/board_arduino_mega2560.go
+++ b/src/machine/board_arduino_mega2560.go
@@ -1,3 +1,4 @@
+//go:build arduino_mega2560
 // +build arduino_mega2560
 
 package machine
diff --git a/src/machine/board_arduino_mkr1000.go b/src/machine/board_arduino_mkr1000.go
index 30ad48e9..b7d2b51a 100644
--- a/src/machine/board_arduino_mkr1000.go
+++ b/src/machine/board_arduino_mkr1000.go
@@ -1,3 +1,4 @@
+//go:build arduino_mkr1000
 // +build arduino_mkr1000
 
 // This contains the pin mappings for the Arduino MKR1000 board.
diff --git a/src/machine/board_arduino_mkrwifi1010.go b/src/machine/board_arduino_mkrwifi1010.go
index 8703e135..89eb25d8 100644
--- a/src/machine/board_arduino_mkrwifi1010.go
+++ b/src/machine/board_arduino_mkrwifi1010.go
@@ -1,3 +1,4 @@
+//go:build arduino_mkrwifi1010
 // +build arduino_mkrwifi1010
 
 // This contains the pin mappings for the Arduino MKR WiFi 1010 board.
diff --git a/src/machine/board_arduino_nano.go b/src/machine/board_arduino_nano.go
index d84b23f3..d3213d4f 100644
--- a/src/machine/board_arduino_nano.go
+++ b/src/machine/board_arduino_nano.go
@@ -1,3 +1,4 @@
+//go:build arduino_nano
 // +build arduino_nano
 
 package machine
diff --git a/src/machine/board_arduino_nano33.go b/src/machine/board_arduino_nano33.go
index 76353bac..49cb09c8 100644
--- a/src/machine/board_arduino_nano33.go
+++ b/src/machine/board_arduino_nano33.go
@@ -1,3 +1,4 @@
+//go:build arduino_nano33
 // +build arduino_nano33
 
 // This contains the pin mappings for the Arduino Nano33 IoT board.
diff --git a/src/machine/board_arduino_zero.go b/src/machine/board_arduino_zero.go
index 651eea82..3c04f37a 100644
--- a/src/machine/board_arduino_zero.go
+++ b/src/machine/board_arduino_zero.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && arduino_zero
 // +build sam,atsamd21,arduino_zero
 
 package machine
diff --git a/src/machine/board_atmega328p.go b/src/machine/board_atmega328p.go
index 030c78fe..007d3164 100644
--- a/src/machine/board_atmega328p.go
+++ b/src/machine/board_atmega328p.go
@@ -1,3 +1,4 @@
+//go:build (avr && atmega328p) || arduino || arduino_nano
 // +build avr,atmega328p arduino arduino_nano
 
 package machine
diff --git a/src/machine/board_atsamd21.go b/src/machine/board_atsamd21.go
index 3b11b452..619af02b 100644
--- a/src/machine/board_atsamd21.go
+++ b/src/machine/board_atsamd21.go
@@ -1,3 +1,4 @@
+//go:build (sam && atsamd21) || arduino_nano33 || circuitplay_express
 // +build sam,atsamd21 arduino_nano33 circuitplay_express
 
 package machine
diff --git a/src/machine/board_atsame54-xpro.go b/src/machine/board_atsame54-xpro.go
index 173ccae5..8c260657 100644
--- a/src/machine/board_atsame54-xpro.go
+++ b/src/machine/board_atsame54-xpro.go
@@ -1,3 +1,4 @@
+//go:build atsame54_xpro
 // +build atsame54_xpro
 
 package machine
diff --git a/src/machine/board_circuitplay_bluefruit.go b/src/machine/board_circuitplay_bluefruit.go
index 0fd699e5..bfa7cb2c 100644
--- a/src/machine/board_circuitplay_bluefruit.go
+++ b/src/machine/board_circuitplay_bluefruit.go
@@ -1,3 +1,4 @@
+//go:build circuitplay_bluefruit
 // +build circuitplay_bluefruit
 
 package machine
diff --git a/src/machine/board_circuitplay_express.go b/src/machine/board_circuitplay_express.go
index 23037a1e..28f59df2 100644
--- a/src/machine/board_circuitplay_express.go
+++ b/src/machine/board_circuitplay_express.go
@@ -1,3 +1,4 @@
+//go:build circuitplay_express
 // +build circuitplay_express
 
 package machine
diff --git a/src/machine/board_clue_alpha.go b/src/machine/board_clue_alpha.go
index d8def8f3..bb302407 100644
--- a/src/machine/board_clue_alpha.go
+++ b/src/machine/board_clue_alpha.go
@@ -1,3 +1,4 @@
+//go:build clue_alpha
 // +build clue_alpha
 
 package machine
diff --git a/src/machine/board_digispark.go b/src/machine/board_digispark.go
index af89656d..55531d55 100644
--- a/src/machine/board_digispark.go
+++ b/src/machine/board_digispark.go
@@ -1,3 +1,4 @@
+//go:build digispark
 // +build digispark
 
 package machine
diff --git a/src/machine/board_esp32-coreboard-v2.go b/src/machine/board_esp32-coreboard-v2.go
index 0145fe4e..cbeb54dc 100644
--- a/src/machine/board_esp32-coreboard-v2.go
+++ b/src/machine/board_esp32-coreboard-v2.go
@@ -1,3 +1,4 @@
+//go:build esp32_coreboard_v2
 // +build esp32_coreboard_v2
 
 package machine
diff --git a/src/machine/board_fe310.go b/src/machine/board_fe310.go
index b6e88a3c..70c26634 100644
--- a/src/machine/board_fe310.go
+++ b/src/machine/board_fe310.go
@@ -1,3 +1,4 @@
+//go:build hifive1b
 // +build hifive1b
 
 package machine
diff --git a/src/machine/board_feather-m0.go b/src/machine/board_feather-m0.go
index cfef7288..a0c71f56 100644
--- a/src/machine/board_feather-m0.go
+++ b/src/machine/board_feather-m0.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && feather_m0
 // +build sam,atsamd21,feather_m0
 
 package machine
diff --git a/src/machine/board_feather-m4-can.go b/src/machine/board_feather-m4-can.go
index 5e9d464f..7bc1a6e3 100644
--- a/src/machine/board_feather-m4-can.go
+++ b/src/machine/board_feather-m4-can.go
@@ -1,3 +1,4 @@
+//go:build feather_m4_can
 // +build feather_m4_can
 
 package machine
diff --git a/src/machine/board_feather-m4.go b/src/machine/board_feather-m4.go
index 901a1872..07783964 100644
--- a/src/machine/board_feather-m4.go
+++ b/src/machine/board_feather-m4.go
@@ -1,3 +1,4 @@
+//go:build feather_m4
 // +build feather_m4
 
 package machine
diff --git a/src/machine/board_feather-nrf52840-sense.go b/src/machine/board_feather-nrf52840-sense.go
index 8a4f7144..ae98ce84 100644
--- a/src/machine/board_feather-nrf52840-sense.go
+++ b/src/machine/board_feather-nrf52840-sense.go
@@ -1,3 +1,4 @@
+//go:build feather_nrf52840_sense
 // +build feather_nrf52840_sense
 
 package machine
diff --git a/src/machine/board_feather-nrf52840.go b/src/machine/board_feather-nrf52840.go
index e433e103..42cdf582 100644
--- a/src/machine/board_feather-nrf52840.go
+++ b/src/machine/board_feather-nrf52840.go
@@ -1,3 +1,4 @@
+//go:build feather_nrf52840
 // +build feather_nrf52840
 
 package machine
diff --git a/src/machine/board_feather-stm32f405.go b/src/machine/board_feather-stm32f405.go
index 0fd14956..1e695a43 100644
--- a/src/machine/board_feather-stm32f405.go
+++ b/src/machine/board_feather-stm32f405.go
@@ -1,3 +1,4 @@
+//go:build feather_stm32f405
 // +build feather_stm32f405
 
 package machine
diff --git a/src/machine/board_feather_rp2040.go b/src/machine/board_feather_rp2040.go
index 77981b23..98ecd174 100644
--- a/src/machine/board_feather_rp2040.go
+++ b/src/machine/board_feather_rp2040.go
@@ -1,3 +1,4 @@
+//go:build feather_rp2040
 // +build feather_rp2040
 
 package machine
diff --git a/src/machine/board_grandcentral-m4.go b/src/machine/board_grandcentral-m4.go
index 7f0a7390..61201826 100644
--- a/src/machine/board_grandcentral-m4.go
+++ b/src/machine/board_grandcentral-m4.go
@@ -1,3 +1,4 @@
+//go:build grandcentral_m4
 // +build grandcentral_m4
 
 package machine
diff --git a/src/machine/board_hifive1b.go b/src/machine/board_hifive1b.go
index d16225a6..7e3001a6 100644
--- a/src/machine/board_hifive1b.go
+++ b/src/machine/board_hifive1b.go
@@ -1,3 +1,4 @@
+//go:build hifive1b
 // +build hifive1b
 
 package machine
diff --git a/src/machine/board_hifive1b_baremetal.go b/src/machine/board_hifive1b_baremetal.go
index 729e985d..28d276f2 100644
--- a/src/machine/board_hifive1b_baremetal.go
+++ b/src/machine/board_hifive1b_baremetal.go
@@ -1,3 +1,4 @@
+//go:build fe310 && hifive1b
 // +build fe310,hifive1b
 
 package machine
diff --git a/src/machine/board_itsybitsy-m0.go b/src/machine/board_itsybitsy-m0.go
index 30bf8f2b..22b2daa7 100644
--- a/src/machine/board_itsybitsy-m0.go
+++ b/src/machine/board_itsybitsy-m0.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && itsybitsy_m0
 // +build sam,atsamd21,itsybitsy_m0
 
 package machine
diff --git a/src/machine/board_itsybitsy-m4.go b/src/machine/board_itsybitsy-m4.go
index b88e44fd..f42efee9 100644
--- a/src/machine/board_itsybitsy-m4.go
+++ b/src/machine/board_itsybitsy-m4.go
@@ -1,3 +1,4 @@
+//go:build itsybitsy_m4
 // +build itsybitsy_m4
 
 package machine
diff --git a/src/machine/board_itsybitsy-nrf52840.go b/src/machine/board_itsybitsy-nrf52840.go
index 418e8383..a003704c 100644
--- a/src/machine/board_itsybitsy-nrf52840.go
+++ b/src/machine/board_itsybitsy-nrf52840.go
@@ -1,3 +1,4 @@
+//go:build itsybitsy_nrf52840
 // +build itsybitsy_nrf52840
 
 package machine
diff --git a/src/machine/board_k210.go b/src/machine/board_k210.go
index 60467a68..d476fee8 100644
--- a/src/machine/board_k210.go
+++ b/src/machine/board_k210.go
@@ -1,3 +1,4 @@
+//go:build maixbit
 // +build maixbit
 
 // Chip datasheet: https://s3.cn-north-1.amazonaws.com.cn/dl.kendryte.com/documents/kendryte_datasheet_20181011163248_en.pdf
diff --git a/src/machine/board_lgt92.go b/src/machine/board_lgt92.go
index e043dcd7..7a4da00b 100644
--- a/src/machine/board_lgt92.go
+++ b/src/machine/board_lgt92.go
@@ -1,3 +1,4 @@
+//go:build lgt92
 // +build lgt92
 
 package machine
diff --git a/src/machine/board_m5stack.go b/src/machine/board_m5stack.go
index 0f05146c..5273034f 100644
--- a/src/machine/board_m5stack.go
+++ b/src/machine/board_m5stack.go
@@ -1,3 +1,4 @@
+//go:build m5stack
 // +build m5stack
 
 package machine
diff --git a/src/machine/board_m5stack_core2.go b/src/machine/board_m5stack_core2.go
index cb20b2ae..93b0b618 100644
--- a/src/machine/board_m5stack_core2.go
+++ b/src/machine/board_m5stack_core2.go
@@ -1,3 +1,4 @@
+//go:build m5stack_core2
 // +build m5stack_core2
 
 package machine
diff --git a/src/machine/board_maixbit.go b/src/machine/board_maixbit.go
index e2c551b0..b633ac42 100644
--- a/src/machine/board_maixbit.go
+++ b/src/machine/board_maixbit.go
@@ -1,3 +1,4 @@
+//go:build maixbit
 // +build maixbit
 
 package machine
diff --git a/src/machine/board_maixbit_baremetal.go b/src/machine/board_maixbit_baremetal.go
index 98733bee..5c9ab770 100644
--- a/src/machine/board_maixbit_baremetal.go
+++ b/src/machine/board_maixbit_baremetal.go
@@ -1,3 +1,4 @@
+//go:build k210 && maixbit
 // +build k210,maixbit
 
 package machine
diff --git a/src/machine/board_matrixportal-m4.go b/src/machine/board_matrixportal-m4.go
index c733e784..cab5f7aa 100644
--- a/src/machine/board_matrixportal-m4.go
+++ b/src/machine/board_matrixportal-m4.go
@@ -1,3 +1,4 @@
+//go:build matrixportal_m4
 // +build matrixportal_m4
 
 package machine
diff --git a/src/machine/board_mdbt50qrx.go b/src/machine/board_mdbt50qrx.go
index 45a059de..3d66fbb2 100644
--- a/src/machine/board_mdbt50qrx.go
+++ b/src/machine/board_mdbt50qrx.go
@@ -1,3 +1,4 @@
+//go:build mdbt50qrx
 // +build mdbt50qrx
 
 package machine
diff --git a/src/machine/board_metro-m4-airlift.go b/src/machine/board_metro-m4-airlift.go
index d70220eb..2350ea71 100644
--- a/src/machine/board_metro-m4-airlift.go
+++ b/src/machine/board_metro-m4-airlift.go
@@ -1,3 +1,4 @@
+//go:build metro_m4_airlift
 // +build metro_m4_airlift
 
 package machine
diff --git a/src/machine/board_microbit-v2.go b/src/machine/board_microbit-v2.go
index 81ccf5be..20c0bc80 100644
--- a/src/machine/board_microbit-v2.go
+++ b/src/machine/board_microbit-v2.go
@@ -1,3 +1,4 @@
+//go:build microbit_v2
 // +build microbit_v2
 
 package machine
diff --git a/src/machine/board_microbit.go b/src/machine/board_microbit.go
index b4af49f8..37c7d334 100644
--- a/src/machine/board_microbit.go
+++ b/src/machine/board_microbit.go
@@ -1,3 +1,4 @@
+//go:build microbit
 // +build microbit
 
 package machine
diff --git a/src/machine/board_nano-rp2040.go b/src/machine/board_nano-rp2040.go
index d91a2658..1e30ca67 100644
--- a/src/machine/board_nano-rp2040.go
+++ b/src/machine/board_nano-rp2040.go
@@ -1,3 +1,4 @@
+//go:build nano_rp2040
 // +build nano_rp2040
 
 // This contains the pin mappings for the Arduino Nano RP2040 Connect board.
diff --git a/src/machine/board_nicenano.go b/src/machine/board_nicenano.go
index 94511bf9..8baf86fa 100644
--- a/src/machine/board_nicenano.go
+++ b/src/machine/board_nicenano.go
@@ -1,3 +1,4 @@
+//go:build nicenano
 // +build nicenano
 
 package machine
diff --git a/src/machine/board_nodemcu.go b/src/machine/board_nodemcu.go
index f9f1af4f..b3dbc335 100644
--- a/src/machine/board_nodemcu.go
+++ b/src/machine/board_nodemcu.go
@@ -1,3 +1,4 @@
+//go:build nodemcu
 // +build nodemcu
 
 // Pinout for the NodeMCU dev kit.
diff --git a/src/machine/board_nrf52840-mdk-usb-dongle.go b/src/machine/board_nrf52840-mdk-usb-dongle.go
index 57a3d197..c1910fec 100644
--- a/src/machine/board_nrf52840-mdk-usb-dongle.go
+++ b/src/machine/board_nrf52840-mdk-usb-dongle.go
@@ -1,3 +1,4 @@
+//go:build nrf52840_mdk_usb_dongle
 // +build nrf52840_mdk_usb_dongle
 
 package machine
diff --git a/src/machine/board_nrf52840-mdk.go b/src/machine/board_nrf52840-mdk.go
index fbc42861..262983c3 100644
--- a/src/machine/board_nrf52840-mdk.go
+++ b/src/machine/board_nrf52840-mdk.go
@@ -1,3 +1,4 @@
+//go:build nrf52840_mdk
 // +build nrf52840_mdk
 
 package machine
diff --git a/src/machine/board_nucleof103rb.go b/src/machine/board_nucleof103rb.go
index 22580e20..3027c5ad 100644
--- a/src/machine/board_nucleof103rb.go
+++ b/src/machine/board_nucleof103rb.go
@@ -1,3 +1,4 @@
+//go:build nucleof103rb
 // +build nucleof103rb
 
 package machine
diff --git a/src/machine/board_nucleof722ze.go b/src/machine/board_nucleof722ze.go
index 41d3f284..4206e39d 100644
--- a/src/machine/board_nucleof722ze.go
+++ b/src/machine/board_nucleof722ze.go
@@ -1,3 +1,4 @@
+//go:build nucleof722ze
 // +build nucleof722ze
 
 package machine
diff --git a/src/machine/board_nucleol031k6.go b/src/machine/board_nucleol031k6.go
index fe85f276..cc0fbe15 100644
--- a/src/machine/board_nucleol031k6.go
+++ b/src/machine/board_nucleol031k6.go
@@ -1,3 +1,4 @@
+//go:build nucleol031k6
 // +build nucleol031k6
 
 package machine
diff --git a/src/machine/board_nucleol432kc.go b/src/machine/board_nucleol432kc.go
index bfebd1ee..d8c91d06 100644
--- a/src/machine/board_nucleol432kc.go
+++ b/src/machine/board_nucleol432kc.go
@@ -1,3 +1,4 @@
+//go:build nucleol432kc
 // +build nucleol432kc
 
 package machine
diff --git a/src/machine/board_nucleol552ze.go b/src/machine/board_nucleol552ze.go
index a0d3ee52..d34f40d6 100644
--- a/src/machine/board_nucleol552ze.go
+++ b/src/machine/board_nucleol552ze.go
@@ -1,3 +1,4 @@
+//go:build nucleol552ze
 // +build nucleol552ze
 
 package machine
diff --git a/src/machine/board_p1am-100.go b/src/machine/board_p1am-100.go
index e263746a..e75d464b 100644
--- a/src/machine/board_p1am-100.go
+++ b/src/machine/board_p1am-100.go
@@ -1,3 +1,4 @@
+//go:build p1am_100
 // +build p1am_100
 
 // This contains the pin mappings for the ProductivityOpen P1AM-100 board.
diff --git a/src/machine/board_particle_argon.go b/src/machine/board_particle_argon.go
index 9427029f..48df2e43 100644
--- a/src/machine/board_particle_argon.go
+++ b/src/machine/board_particle_argon.go
@@ -1,3 +1,4 @@
+//go:build particle_argon
 // +build particle_argon
 
 package machine
diff --git a/src/machine/board_particle_boron.go b/src/machine/board_particle_boron.go
index b6a2c3e5..103cfbb6 100644
--- a/src/machine/board_particle_boron.go
+++ b/src/machine/board_particle_boron.go
@@ -1,3 +1,4 @@
+//go:build particle_boron
 // +build particle_boron
 
 package machine
diff --git a/src/machine/board_particle_xenon.go b/src/machine/board_particle_xenon.go
index 0b25f373..5a902186 100644
--- a/src/machine/board_particle_xenon.go
+++ b/src/machine/board_particle_xenon.go
@@ -1,3 +1,4 @@
+//go:build particle_xenon
 // +build particle_xenon
 
 package machine
diff --git a/src/machine/board_pca10031.go b/src/machine/board_pca10031.go
index 122c00d2..afcd3593 100644
--- a/src/machine/board_pca10031.go
+++ b/src/machine/board_pca10031.go
@@ -1,3 +1,4 @@
+//go:build pca10031
 // +build pca10031
 
 // pca10031 is a nrf51 based dongle, intended for use in wireless applications.
diff --git a/src/machine/board_pca10040.go b/src/machine/board_pca10040.go
index f425ca37..03189ad1 100644
--- a/src/machine/board_pca10040.go
+++ b/src/machine/board_pca10040.go
@@ -1,3 +1,4 @@
+//go:build pca10040
 // +build pca10040
 
 package machine
diff --git a/src/machine/board_pca10056.go b/src/machine/board_pca10056.go
index 78362946..df6bbb87 100644
--- a/src/machine/board_pca10056.go
+++ b/src/machine/board_pca10056.go
@@ -1,3 +1,4 @@
+//go:build pca10056
 // +build pca10056
 
 package machine
diff --git a/src/machine/board_pca10059.go b/src/machine/board_pca10059.go
index 7f616791..42be8f3a 100644
--- a/src/machine/board_pca10059.go
+++ b/src/machine/board_pca10059.go
@@ -1,3 +1,4 @@
+//go:build pca10059
 // +build pca10059
 
 package machine
diff --git a/src/machine/board_pico.go b/src/machine/board_pico.go
index 2cbba390..b2639549 100644
--- a/src/machine/board_pico.go
+++ b/src/machine/board_pico.go
@@ -1,3 +1,4 @@
+//go:build pico
 // +build pico
 
 package machine
diff --git a/src/machine/board_pinetime-devkit0.go b/src/machine/board_pinetime-devkit0.go
index b9669c84..e71f9e97 100644
--- a/src/machine/board_pinetime-devkit0.go
+++ b/src/machine/board_pinetime-devkit0.go
@@ -1,3 +1,4 @@
+//go:build pinetime_devkit0
 // +build pinetime_devkit0
 
 package machine
diff --git a/src/machine/board_pybadge.go b/src/machine/board_pybadge.go
index f747286d..69b814a5 100644
--- a/src/machine/board_pybadge.go
+++ b/src/machine/board_pybadge.go
@@ -1,3 +1,4 @@
+//go:build pybadge
 // +build pybadge
 
 package machine
diff --git a/src/machine/board_pygamer.go b/src/machine/board_pygamer.go
index 4662e3a6..319e9e95 100644
--- a/src/machine/board_pygamer.go
+++ b/src/machine/board_pygamer.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && pygamer
 // +build sam,atsamd51,pygamer
 
 package machine
diff --git a/src/machine/board_pyportal.go b/src/machine/board_pyportal.go
index e8dfc0b1..3e7aa7cb 100644
--- a/src/machine/board_pyportal.go
+++ b/src/machine/board_pyportal.go
@@ -1,3 +1,4 @@
+//go:build pyportal
 // +build pyportal
 
 package machine
diff --git a/src/machine/board_qtpy.go b/src/machine/board_qtpy.go
index 04ef5718..aa294b81 100644
--- a/src/machine/board_qtpy.go
+++ b/src/machine/board_qtpy.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && qtpy
 // +build sam,atsamd21,qtpy
 
 package machine
diff --git a/src/machine/board_reelboard.go b/src/machine/board_reelboard.go
index 7fd715bb..c8383c1f 100644
--- a/src/machine/board_reelboard.go
+++ b/src/machine/board_reelboard.go
@@ -1,3 +1,4 @@
+//go:build reelboard
 // +build reelboard
 
 package machine
diff --git a/src/machine/board_stm32f469disco.go b/src/machine/board_stm32f469disco.go
index db20aca7..07a51c0b 100644
--- a/src/machine/board_stm32f469disco.go
+++ b/src/machine/board_stm32f469disco.go
@@ -1,3 +1,4 @@
+//go:build stm32f469disco
 // +build stm32f469disco
 
 package machine
diff --git a/src/machine/board_teensy36.go b/src/machine/board_teensy36.go
index 8fa71f6e..106382be 100644
--- a/src/machine/board_teensy36.go
+++ b/src/machine/board_teensy36.go
@@ -1,3 +1,4 @@
+//go:build nxp && mk66f18 && teensy36
 // +build nxp,mk66f18,teensy36
 
 package machine
diff --git a/src/machine/board_teensy40.go b/src/machine/board_teensy40.go
index f96f63de..9f6f8617 100644
--- a/src/machine/board_teensy40.go
+++ b/src/machine/board_teensy40.go
@@ -1,3 +1,4 @@
+//go:build teensy40
 // +build teensy40
 
 package machine
diff --git a/src/machine/board_trinket.go b/src/machine/board_trinket.go
index 06f2ace3..34f27191 100644
--- a/src/machine/board_trinket.go
+++ b/src/machine/board_trinket.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && trinket_m0
 // +build sam,atsamd21,trinket_m0
 
 package machine
diff --git a/src/machine/board_wioterminal.go b/src/machine/board_wioterminal.go
index 0726b1ac..c19de464 100644
--- a/src/machine/board_wioterminal.go
+++ b/src/machine/board_wioterminal.go
@@ -1,3 +1,4 @@
+//go:build wioterminal
 // +build wioterminal
 
 package machine
diff --git a/src/machine/board_x9pro.go b/src/machine/board_x9pro.go
index 111dcf5f..5e2d6776 100644
--- a/src/machine/board_x9pro.go
+++ b/src/machine/board_x9pro.go
@@ -1,3 +1,4 @@
+//go:build x9pro
 // +build x9pro
 
 package machine
diff --git a/src/machine/board_xiao.go b/src/machine/board_xiao.go
index 108346ad..aa8c4404 100644
--- a/src/machine/board_xiao.go
+++ b/src/machine/board_xiao.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && xiao
 // +build sam,atsamd21,xiao
 
 package machine
diff --git a/src/machine/i2s.go b/src/machine/i2s.go
index caecc066..91c97ec9 100644
--- a/src/machine/i2s.go
+++ b/src/machine/i2s.go
@@ -1,3 +1,4 @@
+//go:build sam
 // +build sam
 
 // This is the definition for I2S bus functions.
diff --git a/src/machine/machine_atmega.go b/src/machine/machine_atmega.go
index 6e2b59cf..41d5192c 100644
--- a/src/machine/machine_atmega.go
+++ b/src/machine/machine_atmega.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega
 // +build avr,atmega
 
 package machine
diff --git a/src/machine/machine_atmega1280.go b/src/machine/machine_atmega1280.go
index 391c2740..6c286f18 100644
--- a/src/machine/machine_atmega1280.go
+++ b/src/machine/machine_atmega1280.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega1280
 // +build avr,atmega1280
 
 package machine
diff --git a/src/machine/machine_atmega1284p.go b/src/machine/machine_atmega1284p.go
index 83a88906..633a4e9c 100644
--- a/src/machine/machine_atmega1284p.go
+++ b/src/machine/machine_atmega1284p.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega1284p
 // +build avr,atmega1284p
 
 package machine
diff --git a/src/machine/machine_atmega2560.go b/src/machine/machine_atmega2560.go
index d50f9081..2cc97cdb 100644
--- a/src/machine/machine_atmega2560.go
+++ b/src/machine/machine_atmega2560.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega2560
 // +build avr,atmega2560
 
 package machine
diff --git a/src/machine/machine_atmega328p.go b/src/machine/machine_atmega328p.go
index ecb3c1b8..ee92c1b5 100644
--- a/src/machine/machine_atmega328p.go
+++ b/src/machine/machine_atmega328p.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega328p
 // +build avr,atmega328p
 
 package machine
diff --git a/src/machine/machine_atmega328pb.go b/src/machine/machine_atmega328pb.go
index 38c26dfb..afae4798 100644
--- a/src/machine/machine_atmega328pb.go
+++ b/src/machine/machine_atmega328pb.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega328pb
 // +build avr,atmega328pb
 
 package machine
diff --git a/src/machine/machine_atsamd21.go b/src/machine/machine_atsamd21.go
index cb151703..92f21b0a 100644
--- a/src/machine/machine_atsamd21.go
+++ b/src/machine/machine_atsamd21.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21
 // +build sam,atsamd21
 
 // Peripheral abstraction layer for the atsamd21.
diff --git a/src/machine/machine_atsamd21e18.go b/src/machine/machine_atsamd21e18.go
index fd4f5d09..f019d612 100644
--- a/src/machine/machine_atsamd21e18.go
+++ b/src/machine/machine_atsamd21e18.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && atsamd21e18
 // +build sam,atsamd21,atsamd21e18
 
 // Peripheral abstraction layer for the atsamd21.
diff --git a/src/machine/machine_atsamd21g18.go b/src/machine/machine_atsamd21g18.go
index 44cc5828..aece56f4 100644
--- a/src/machine/machine_atsamd21g18.go
+++ b/src/machine/machine_atsamd21g18.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && atsamd21g18
 // +build sam,atsamd21,atsamd21g18
 
 // Peripheral abstraction layer for the atsamd21.
diff --git a/src/machine/machine_atsamd51g19.go b/src/machine/machine_atsamd51g19.go
index f50701f1..e8c8f69a 100644
--- a/src/machine/machine_atsamd51g19.go
+++ b/src/machine/machine_atsamd51g19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51g19
 // +build sam,atsamd51,atsamd51g19
 
 // Peripheral abstraction layer for the atsamd51.
diff --git a/src/machine/machine_atsamd51j19.go b/src/machine/machine_atsamd51j19.go
index c29d9a7a..9e74deee 100644
--- a/src/machine/machine_atsamd51j19.go
+++ b/src/machine/machine_atsamd51j19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51j19
 // +build sam,atsamd51,atsamd51j19
 
 // Peripheral abstraction layer for the atsamd51.
diff --git a/src/machine/machine_atsamd51j20.go b/src/machine/machine_atsamd51j20.go
index 966114e0..68b1f8ee 100644
--- a/src/machine/machine_atsamd51j20.go
+++ b/src/machine/machine_atsamd51j20.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51j20
 // +build sam,atsamd51,atsamd51j20
 
 // Peripheral abstraction layer for the atsamd51.
diff --git a/src/machine/machine_atsamd51p19.go b/src/machine/machine_atsamd51p19.go
index b642fae7..458d6b62 100644
--- a/src/machine/machine_atsamd51p19.go
+++ b/src/machine/machine_atsamd51p19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51p19
 // +build sam,atsamd51,atsamd51p19
 
 // Peripheral abstraction layer for the atsamd51.
diff --git a/src/machine/machine_atsamd51p20.go b/src/machine/machine_atsamd51p20.go
index e5d0faa0..c8312fb5 100644
--- a/src/machine/machine_atsamd51p20.go
+++ b/src/machine/machine_atsamd51p20.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51p20
 // +build sam,atsamd51,atsamd51p20
 
 // Peripheral abstraction layer for the atsamd51.
diff --git a/src/machine/machine_atsame51j19.go b/src/machine/machine_atsame51j19.go
index 3064648e..01e73869 100644
--- a/src/machine/machine_atsame51j19.go
+++ b/src/machine/machine_atsame51j19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsame51 && atsame51j19
 // +build sam,atsame51,atsame51j19
 
 // Peripheral abstraction layer for the atsame51.
diff --git a/src/machine/machine_atsame54p20.go b/src/machine/machine_atsame54p20.go
index 2a49019c..74ab5f3c 100644
--- a/src/machine/machine_atsame54p20.go
+++ b/src/machine/machine_atsame54p20.go
@@ -1,3 +1,4 @@
+//go:build sam && atsame5x && atsame54p20
 // +build sam,atsame5x,atsame54p20
 
 // Peripheral abstraction layer for the atsame54.
diff --git a/src/machine/machine_atsame5x_can.go b/src/machine/machine_atsame5x_can.go
index 9cad660e..47be3051 100644
--- a/src/machine/machine_atsame5x_can.go
+++ b/src/machine/machine_atsame5x_can.go
@@ -1,3 +1,4 @@
+//go:build (sam && atsame51) || (sam && atsame54)
 // +build sam,atsame51 sam,atsame54
 
 package machine
diff --git a/src/machine/machine_attiny85.go b/src/machine/machine_attiny85.go
index 5a6c37c7..002a1fea 100644
--- a/src/machine/machine_attiny85.go
+++ b/src/machine/machine_attiny85.go
@@ -1,3 +1,4 @@
+//go:build attiny85
 // +build attiny85
 
 package machine
diff --git a/src/machine/machine_esp32.go b/src/machine/machine_esp32.go
index 31a32482..b2187e78 100644
--- a/src/machine/machine_esp32.go
+++ b/src/machine/machine_esp32.go
@@ -1,3 +1,4 @@
+//go:build esp32
 // +build esp32
 
 package machine
diff --git a/src/machine/machine_esp32c3.go b/src/machine/machine_esp32c3.go
index 39ac78bb..695615c1 100644
--- a/src/machine/machine_esp32c3.go
+++ b/src/machine/machine_esp32c3.go
@@ -1,3 +1,4 @@
+//go:build esp32c3
 // +build esp32c3
 
 package machine
diff --git a/src/machine/machine_esp8266.go b/src/machine/machine_esp8266.go
index a5fbbc67..77fb0ba6 100644
--- a/src/machine/machine_esp8266.go
+++ b/src/machine/machine_esp8266.go
@@ -1,3 +1,4 @@
+//go:build esp8266
 // +build esp8266
 
 package machine
diff --git a/src/machine/machine_fe310.go b/src/machine/machine_fe310.go
index 609571ea..7a136020 100644
--- a/src/machine/machine_fe310.go
+++ b/src/machine/machine_fe310.go
@@ -1,3 +1,4 @@
+//go:build fe310
 // +build fe310
 
 package machine
diff --git a/src/machine/machine_gameboyadvance.go b/src/machine/machine_gameboyadvance.go
index c35b7ef3..9c7c8392 100644
--- a/src/machine/machine_gameboyadvance.go
+++ b/src/machine/machine_gameboyadvance.go
@@ -1,3 +1,4 @@
+//go:build gameboyadvance
 // +build gameboyadvance
 
 package machine
diff --git a/src/machine/machine_generic.go b/src/machine/machine_generic.go
index cbcc98ec..51ea63c0 100644
--- a/src/machine/machine_generic.go
+++ b/src/machine/machine_generic.go
@@ -1,3 +1,4 @@
+//go:build !baremetal
 // +build !baremetal
 
 package machine
diff --git a/src/machine/machine_generic_peripherals.go b/src/machine/machine_generic_peripherals.go
index 03146e8b..a9ac85d5 100644
--- a/src/machine/machine_generic_peripherals.go
+++ b/src/machine/machine_generic_peripherals.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !arduino_mkr1000 && !arduino_mkrwifi1010 && !arduino_nano33 && !arduino_zero && !circuitplay_express && !feather_m0 && !feather_m4 && !grandcentral_m4 && !itsybitsy_m0 && !itsybitsy_m4 && !matrixportal_m4 && !metro_m4_airlift && !p1am_100 && !pybadge && !pygamer && !pyportal && !qtpy && !trinket_m0 && !wioterminal && !xiao
 // +build !baremetal,!arduino_mkr1000,!arduino_mkrwifi1010,!arduino_nano33,!arduino_zero,!circuitplay_express,!feather_m0,!feather_m4,!grandcentral_m4,!itsybitsy_m0,!itsybitsy_m4,!matrixportal_m4,!metro_m4_airlift,!p1am_100,!pybadge,!pygamer,!pyportal,!qtpy,!trinket_m0,!wioterminal,!xiao
 
 package machine
diff --git a/src/machine/machine_k210.go b/src/machine/machine_k210.go
index 4a8bc98f..36440600 100644
--- a/src/machine/machine_k210.go
+++ b/src/machine/machine_k210.go
@@ -1,3 +1,4 @@
+//go:build k210
 // +build k210
 
 package machine
diff --git a/src/machine/machine_mimxrt1062.go b/src/machine/machine_mimxrt1062.go
index bcb06021..05d79b2a 100644
--- a/src/machine/machine_mimxrt1062.go
+++ b/src/machine/machine_mimxrt1062.go
@@ -1,3 +1,4 @@
+//go:build mimxrt1062
 // +build mimxrt1062
 
 package machine
diff --git a/src/machine/machine_mimxrt1062_uart.go b/src/machine/machine_mimxrt1062_uart.go
index b61fd04f..95813d83 100644
--- a/src/machine/machine_mimxrt1062_uart.go
+++ b/src/machine/machine_mimxrt1062_uart.go
@@ -1,3 +1,4 @@
+//go:build mimxrt1062
 // +build mimxrt1062
 
 package machine
diff --git a/src/machine/machine_nrf51.go b/src/machine/machine_nrf51.go
index d60dc5f1..9068df0b 100644
--- a/src/machine/machine_nrf51.go
+++ b/src/machine/machine_nrf51.go
@@ -1,3 +1,4 @@
+//go:build nrf51
 // +build nrf51
 
 package machine
diff --git a/src/machine/machine_nrf52.go b/src/machine/machine_nrf52.go
index 45e48159..f5c6ed24 100644
--- a/src/machine/machine_nrf52.go
+++ b/src/machine/machine_nrf52.go
@@ -1,3 +1,4 @@
+//go:build nrf52
 // +build nrf52
 
 package machine
diff --git a/src/machine/machine_nrf52833.go b/src/machine/machine_nrf52833.go
index 73f86f15..1d1ab961 100644
--- a/src/machine/machine_nrf52833.go
+++ b/src/machine/machine_nrf52833.go
@@ -1,3 +1,4 @@
+//go:build nrf52833
 // +build nrf52833
 
 package machine
diff --git a/src/machine/machine_nrf52840.go b/src/machine/machine_nrf52840.go
index d7d6ae2b..f0a59f54 100644
--- a/src/machine/machine_nrf52840.go
+++ b/src/machine/machine_nrf52840.go
@@ -1,3 +1,4 @@
+//go:build nrf52840
 // +build nrf52840
 
 package machine
diff --git a/src/machine/machine_nrf52840_usb.go b/src/machine/machine_nrf52840_usb.go
index 82a44afe..098424a3 100644
--- a/src/machine/machine_nrf52840_usb.go
+++ b/src/machine/machine_nrf52840_usb.go
@@ -1,3 +1,4 @@
+//go:build nrf52840
 // +build nrf52840
 
 package machine
diff --git a/src/machine/machine_nrf52840_usb_reset_bossa.go b/src/machine/machine_nrf52840_usb_reset_bossa.go
index 42c6ad00..1125696e 100644
--- a/src/machine/machine_nrf52840_usb_reset_bossa.go
+++ b/src/machine/machine_nrf52840_usb_reset_bossa.go
@@ -1,3 +1,4 @@
+//go:build nrf52840 && nrf52840_reset_bossa
 // +build nrf52840,nrf52840_reset_bossa
 
 package machine
diff --git a/src/machine/machine_nrf52840_usb_reset_none.go b/src/machine/machine_nrf52840_usb_reset_none.go
index 796a021e..a7a99887 100644
--- a/src/machine/machine_nrf52840_usb_reset_none.go
+++ b/src/machine/machine_nrf52840_usb_reset_none.go
@@ -1,3 +1,4 @@
+//go:build nrf52840 && !nrf52840_reset_uf2 && !nrf52840_reset_bossa
 // +build nrf52840,!nrf52840_reset_uf2,!nrf52840_reset_bossa
 
 package machine
diff --git a/src/machine/machine_nrf52840_usb_reset_uf2.go b/src/machine/machine_nrf52840_usb_reset_uf2.go
index e1d15cd5..ec685529 100644
--- a/src/machine/machine_nrf52840_usb_reset_uf2.go
+++ b/src/machine/machine_nrf52840_usb_reset_uf2.go
@@ -1,3 +1,4 @@
+//go:build nrf52840 && nrf52840_reset_uf2
 // +build nrf52840,nrf52840_reset_uf2
 
 package machine
diff --git a/src/machine/machine_nrf528xx.go b/src/machine/machine_nrf528xx.go
index 2cf2e10b..02fe9ebc 100644
--- a/src/machine/machine_nrf528xx.go
+++ b/src/machine/machine_nrf528xx.go
@@ -1,3 +1,4 @@
+//go:build nrf52 || nrf52840 || nrf52833
 // +build nrf52 nrf52840 nrf52833
 
 package machine
diff --git a/src/machine/machine_nxpmk66f18.go b/src/machine/machine_nxpmk66f18.go
index aaecee53..a8257b0b 100644
--- a/src/machine/machine_nxpmk66f18.go
+++ b/src/machine/machine_nxpmk66f18.go
@@ -27,6 +27,7 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+//go:build nxp && mk66f18
 // +build nxp,mk66f18
 
 package machine
diff --git a/src/machine/machine_nxpmk66f18_uart.go b/src/machine/machine_nxpmk66f18_uart.go
index 2d8eae01..ccbb18ed 100644
--- a/src/machine/machine_nxpmk66f18_uart.go
+++ b/src/machine/machine_nxpmk66f18_uart.go
@@ -27,6 +27,7 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+//go:build nxp && mk66f18
 // +build nxp,mk66f18
 
 package machine
diff --git a/src/machine/machine_rp2040_adc.go b/src/machine/machine_rp2040_adc.go
index 5598c6b7..c9631e39 100644
--- a/src/machine/machine_rp2040_adc.go
+++ b/src/machine/machine_rp2040_adc.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_clocks.go b/src/machine/machine_rp2040_clocks.go
index 38da5ffa..3a0c714a 100644
--- a/src/machine/machine_rp2040_clocks.go
+++ b/src/machine/machine_rp2040_clocks.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_i2c.go b/src/machine/machine_rp2040_i2c.go
index efbb62a4..f4d9d470 100644
--- a/src/machine/machine_rp2040_i2c.go
+++ b/src/machine/machine_rp2040_i2c.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_pll.go b/src/machine/machine_rp2040_pll.go
index 275aa25f..d716566b 100644
--- a/src/machine/machine_rp2040_pll.go
+++ b/src/machine/machine_rp2040_pll.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_resets.go b/src/machine/machine_rp2040_resets.go
index 39c83450..1a6ad99e 100644
--- a/src/machine/machine_rp2040_resets.go
+++ b/src/machine/machine_rp2040_resets.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_spi.go b/src/machine/machine_rp2040_spi.go
index ac2bcabe..8e552541 100644
--- a/src/machine/machine_rp2040_spi.go
+++ b/src/machine/machine_rp2040_spi.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_timer.go b/src/machine/machine_rp2040_timer.go
index e714a191..1ebe2130 100644
--- a/src/machine/machine_rp2040_timer.go
+++ b/src/machine/machine_rp2040_timer.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_uart.go b/src/machine/machine_rp2040_uart.go
index e2b5f733..7dd822cf 100644
--- a/src/machine/machine_rp2040_uart.go
+++ b/src/machine/machine_rp2040_uart.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_watchdog.go b/src/machine/machine_rp2040_watchdog.go
index b55bbc67..e2dc196f 100644
--- a/src/machine/machine_rp2040_watchdog.go
+++ b/src/machine/machine_rp2040_watchdog.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_rp2040_xosc.go b/src/machine/machine_rp2040_xosc.go
index 35785394..f670de40 100644
--- a/src/machine/machine_rp2040_xosc.go
+++ b/src/machine/machine_rp2040_xosc.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package machine
diff --git a/src/machine/machine_stm32.go b/src/machine/machine_stm32.go
index 1f92b195..a5d4b382 100644
--- a/src/machine/machine_stm32.go
+++ b/src/machine/machine_stm32.go
@@ -1,3 +1,4 @@
+//go:build stm32
 // +build stm32
 
 package machine
diff --git a/src/machine/machine_stm32_exti_afio.go b/src/machine/machine_stm32_exti_afio.go
index aee4936a..0cf34003 100644
--- a/src/machine/machine_stm32_exti_afio.go
+++ b/src/machine/machine_stm32_exti_afio.go
@@ -1,3 +1,4 @@
+//go:build stm32f1
 // +build stm32f1
 
 package machine
diff --git a/src/machine/machine_stm32_exti_exti.go b/src/machine/machine_stm32_exti_exti.go
index 73db5e1e..e21cfae5 100644
--- a/src/machine/machine_stm32_exti_exti.go
+++ b/src/machine/machine_stm32_exti_exti.go
@@ -1,3 +1,4 @@
+//go:build stm32l5
 // +build stm32l5
 
 package machine
diff --git a/src/machine/machine_stm32_i2c_reva.go b/src/machine/machine_stm32_i2c_reva.go
index 4d7e2190..eee4e155 100644
--- a/src/machine/machine_stm32_i2c_reva.go
+++ b/src/machine/machine_stm32_i2c_reva.go
@@ -1,3 +1,4 @@
+//go:build stm32f4 || stm32f1
 // +build stm32f4 stm32f1
 
 package machine
diff --git a/src/machine/machine_stm32_tim.go b/src/machine/machine_stm32_tim.go
index 41e4fb0f..02c6c7a1 100644
--- a/src/machine/machine_stm32_tim.go
+++ b/src/machine/machine_stm32_tim.go
@@ -1,3 +1,4 @@
+//go:build stm32
 // +build stm32
 
 package machine
diff --git a/src/machine/machine_stm32_tim_moder.go b/src/machine/machine_stm32_tim_moder.go
index e1c359ba..e868469f 100644
--- a/src/machine/machine_stm32_tim_moder.go
+++ b/src/machine/machine_stm32_tim_moder.go
@@ -1,3 +1,4 @@
+//go:build stm32 && !stm32f1
 // +build stm32,!stm32f1
 
 package machine
diff --git a/src/machine/machine_stm32_uart.go b/src/machine/machine_stm32_uart.go
index 62f7cb19..9fdd17cb 100644
--- a/src/machine/machine_stm32_uart.go
+++ b/src/machine/machine_stm32_uart.go
@@ -1,3 +1,4 @@
+//go:build stm32
 // +build stm32
 
 package machine
diff --git a/src/machine/machine_stm32f103.go b/src/machine/machine_stm32f103.go
index 0e21c455..4c677802 100644
--- a/src/machine/machine_stm32f103.go
+++ b/src/machine/machine_stm32f103.go
@@ -1,3 +1,4 @@
+//go:build stm32 && stm32f103
 // +build stm32,stm32f103
 
 package machine
diff --git a/src/machine/machine_stm32f7x2.go b/src/machine/machine_stm32f7x2.go
index 7035c38c..bdfa27bc 100644
--- a/src/machine/machine_stm32f7x2.go
+++ b/src/machine/machine_stm32f7x2.go
@@ -1,3 +1,4 @@
+//go:build stm32f7x2
 // +build stm32f7x2
 
 package machine
diff --git a/src/machine/machine_stm32l0x1.go b/src/machine/machine_stm32l0x1.go
index 033718c5..254fb36c 100644
--- a/src/machine/machine_stm32l0x1.go
+++ b/src/machine/machine_stm32l0x1.go
@@ -1,3 +1,4 @@
+//go:build stm32l0x1
 // +build stm32l0x1
 
 package machine
diff --git a/src/machine/machine_stm32l5x2.go b/src/machine/machine_stm32l5x2.go
index fc81b274..966c0ceb 100644
--- a/src/machine/machine_stm32l5x2.go
+++ b/src/machine/machine_stm32l5x2.go
@@ -1,3 +1,4 @@
+//go:build stm32l5x2
 // +build stm32l5x2
 
 package machine
diff --git a/src/machine/serial-none.go b/src/machine/serial-none.go
index 22e94cc9..3596769f 100644
--- a/src/machine/serial-none.go
+++ b/src/machine/serial-none.go
@@ -1,3 +1,4 @@
+//go:build baremetal && serial.none
 // +build baremetal,serial.none
 
 package machine
diff --git a/src/machine/serial-uart.go b/src/machine/serial-uart.go
index d3edf832..30575502 100644
--- a/src/machine/serial-uart.go
+++ b/src/machine/serial-uart.go
@@ -1,3 +1,4 @@
+//go:build baremetal && serial.uart
 // +build baremetal,serial.uart
 
 package machine
diff --git a/src/machine/serial-usb.go b/src/machine/serial-usb.go
index 476d4b0c..ac484f87 100644
--- a/src/machine/serial-usb.go
+++ b/src/machine/serial-usb.go
@@ -1,3 +1,4 @@
+//go:build baremetal && serial.usb
 // +build baremetal,serial.usb
 
 package machine
diff --git a/src/machine/uart.go b/src/machine/uart.go
index 8fbac871..ccfc64ee 100644
--- a/src/machine/uart.go
+++ b/src/machine/uart.go
@@ -1,3 +1,4 @@
+//go:build atmega || esp || nrf || sam || sifive || stm32 || k210 || nxp || rp2040
 // +build atmega esp nrf sam sifive stm32 k210 nxp rp2040
 
 package machine
diff --git a/src/machine/usb.go b/src/machine/usb.go
index 4bea1880..1789e170 100644
--- a/src/machine/usb.go
+++ b/src/machine/usb.go
@@ -1,3 +1,4 @@
+//go:build sam || nrf52840
 // +build sam nrf52840
 
 package machine
diff --git a/src/os/dir.go b/src/os/dir.go
index 72bd2c26..f3ad9f69 100644
--- a/src/os/dir.go
+++ b/src/os/dir.go
@@ -1,3 +1,4 @@
+//go:build go1.16
 // +build go1.16
 
 // Copyright 2016 The Go Authors. All rights reserved.
diff --git a/src/os/dir_other.go b/src/os/dir_other.go
index fea6fe06..0451d7dc 100644
--- a/src/os/dir_other.go
+++ b/src/os/dir_other.go
@@ -1,3 +1,4 @@
+//go:build (go1.16 && baremetal) || (go1.16 && js) || (go1.16 && wasi) || (go1.16 && windows)
 // +build go1.16,baremetal go1.16,js go1.16,wasi go1.16,windows
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/dir_other_go115.go b/src/os/dir_other_go115.go
index 8bc4036d..028b5b99 100644
--- a/src/os/dir_other_go115.go
+++ b/src/os/dir_other_go115.go
@@ -1,3 +1,4 @@
+//go:build !go1.16
 // +build !go1.16
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/dir_test.go b/src/os/dir_test.go
index 9ff799ca..f088861c 100644
--- a/src/os/dir_test.go
+++ b/src/os/dir_test.go
@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal && !js && !wasi && !386 && !arm)
 // +build darwin linux,!baremetal,!js,!wasi,!386,!arm
 
 package os_test
diff --git a/src/os/dir_unix.go b/src/os/dir_unix.go
index 9bcecb37..659b612b 100644
--- a/src/os/dir_unix.go
+++ b/src/os/dir_unix.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && !baremetal && !wasi
 // +build linux,!baremetal,!wasi
 
 package os
diff --git a/src/os/dirent_linux.go b/src/os/dirent_linux.go
index 564703e8..c249f615 100644
--- a/src/os/dirent_linux.go
+++ b/src/os/dirent_linux.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !js && !wasi
 // +build !baremetal,!js,!wasi
 
 // Copyright 2020 The Go Authors. All rights reserved.
diff --git a/src/os/env_unix_test.go b/src/os/env_unix_test.go
index 9a4ec6fc..d567acf1 100644
--- a/src/os/env_unix_test.go
+++ b/src/os/env_unix_test.go
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//+build darwin linux
+//go:build darwin || linux
+// +build darwin linux
 
 package os_test
 
diff --git a/src/os/executable_other.go b/src/os/executable_other.go
index 0c9974f9..4bf1f042 100644
--- a/src/os/executable_other.go
+++ b/src/os/executable_other.go
@@ -1,3 +1,4 @@
+//go:build !linux || baremetal
 // +build !linux baremetal
 
 package os
diff --git a/src/os/executable_procfs.go b/src/os/executable_procfs.go
index 1abe6f1a..cabe3744 100644
--- a/src/os/executable_procfs.go
+++ b/src/os/executable_procfs.go
@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && !baremetal
 // +build linux,!baremetal
 
 package os
diff --git a/src/os/file_anyos_test.go b/src/os/file_anyos_test.go
index 51dac61d..6d5defca 100644
--- a/src/os/file_anyos_test.go
+++ b/src/os/file_anyos_test.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !js
 // +build !baremetal,!js
 
 package os_test
diff --git a/src/os/file_go_116.go b/src/os/file_go_116.go
index 4b59e202..e383392a 100644
--- a/src/os/file_go_116.go
+++ b/src/os/file_go_116.go
@@ -1,3 +1,4 @@
+//go:build go1.16
 // +build go1.16
 
 package os
diff --git a/src/os/file_go_116_test.go b/src/os/file_go_116_test.go
index fa582e21..c218a02d 100644
--- a/src/os/file_go_116_test.go
+++ b/src/os/file_go_116_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.16 && !baremetal && !js && !wasi
 // +build go1.16,!baremetal,!js,!wasi
 
 // DirFS tests copied verbatim from upstream os_test.go, and adjusted minimally to fit tinygo.
diff --git a/src/os/file_other.go b/src/os/file_other.go
index b97d249d..7963c50a 100644
--- a/src/os/file_other.go
+++ b/src/os/file_other.go
@@ -1,3 +1,4 @@
+//go:build baremetal || (wasm && !wasi)
 // +build baremetal wasm,!wasi
 
 package os
diff --git a/src/os/file_unix.go b/src/os/file_unix.go
index 76cc3ca7..6bca8ed9 100644
--- a/src/os/file_unix.go
+++ b/src/os/file_unix.go
@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal)
 // +build darwin linux,!baremetal
 
 // Portions copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/os_anyos_test.go b/src/os/os_anyos_test.go
index ed0d9daf..0002f072 100644
--- a/src/os/os_anyos_test.go
+++ b/src/os/os_anyos_test.go
@@ -1,3 +1,4 @@
+//go:build windows || darwin || (linux && !baremetal)
 // +build windows darwin linux,!baremetal
 
 package os_test
diff --git a/src/os/os_chmod_test.go b/src/os/os_chmod_test.go
index b4207c2a..01ec7f66 100644
--- a/src/os/os_chmod_test.go
+++ b/src/os/os_chmod_test.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !js && !wasi
 // +build !baremetal,!js,!wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/os_symlink_test.go b/src/os/os_symlink_test.go
index ad74e5dd..dd974797 100644
--- a/src/os/os_symlink_test.go
+++ b/src/os/os_symlink_test.go
@@ -1,3 +1,4 @@
+//go:build !windows && !baremetal && !js && !wasi
 // +build !windows,!baremetal,!js,!wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/path.go b/src/os/path.go
index 65800e98..3cdc91a0 100644
--- a/src/os/path.go
+++ b/src/os/path.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !js
 // +build !baremetal,!js
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/seek_unix_bad.go b/src/os/seek_unix_bad.go
index a242950c..13f1d98c 100644
--- a/src/os/seek_unix_bad.go
+++ b/src/os/seek_unix_bad.go
@@ -1,3 +1,4 @@
+//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi)
 // +build linux,!baremetal,386 linux,!baremetal,arm,!wasi
 
 package os
diff --git a/src/os/stat_linux.go b/src/os/stat_linux.go
index c4164f70..d186926a 100644
--- a/src/os/stat_linux.go
+++ b/src/os/stat_linux.go
@@ -1,3 +1,4 @@
+//go:build linux && !baremetal
 // +build linux,!baremetal
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/stat_other.go b/src/os/stat_other.go
index 53555cef..5b574abb 100644
--- a/src/os/stat_other.go
+++ b/src/os/stat_other.go
@@ -1,4 +1,5 @@
-//  +build baremetal wasm,!wasi
+//go:build baremetal || (wasm && !wasi)
+// +build baremetal wasm,!wasi
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/stat_unix.go b/src/os/stat_unix.go
index 02e3e1aa..68f0168b 100644
--- a/src/os/stat_unix.go
+++ b/src/os/stat_unix.go
@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal)
 // +build darwin linux,!baremetal
 
 // Copyright 2016 The Go Authors. All rights reserved.
diff --git a/src/os/types_anyos.go b/src/os/types_anyos.go
index 4cf02ff3..bc404f35 100644
--- a/src/os/types_anyos.go
+++ b/src/os/types_anyos.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !js
 // +build !baremetal,!js
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/os/types_unix.go b/src/os/types_unix.go
index 5e345b55..095fabda 100644
--- a/src/os/types_unix.go
+++ b/src/os/types_unix.go
@@ -1,3 +1,4 @@
+//go:build darwin || (linux && !baremetal)
 // +build darwin linux,!baremetal
 
 // Copyright 2009 The Go Authors. All rights reserved.
diff --git a/src/runtime/arch_arm.go b/src/runtime/arch_arm.go
index 925b7b73..679840f4 100644
--- a/src/runtime/arch_arm.go
+++ b/src/runtime/arch_arm.go
@@ -1,3 +1,4 @@
+//go:build (arm && !baremetal && !tinygo.wasm) || (arm && arm7tdmi)
 // +build arm,!baremetal,!tinygo.wasm arm,arm7tdmi
 
 package runtime
diff --git a/src/runtime/arch_tinygoriscv32.go b/src/runtime/arch_tinygoriscv32.go
index dcae7604..046006aa 100644
--- a/src/runtime/arch_tinygoriscv32.go
+++ b/src/runtime/arch_tinygoriscv32.go
@@ -1,3 +1,4 @@
+//go:build tinygo.riscv32
 // +build tinygo.riscv32
 
 package runtime
diff --git a/src/runtime/arch_tinygoriscv64.go b/src/runtime/arch_tinygoriscv64.go
index a4a8c14f..71410e6e 100644
--- a/src/runtime/arch_tinygoriscv64.go
+++ b/src/runtime/arch_tinygoriscv64.go
@@ -1,3 +1,4 @@
+//go:build tinygo.riscv64
 // +build tinygo.riscv64
 
 package runtime
diff --git a/src/runtime/arch_tinygowasm.go b/src/runtime/arch_tinygowasm.go
index a84d4c44..e370b629 100644
--- a/src/runtime/arch_tinygowasm.go
+++ b/src/runtime/arch_tinygowasm.go
@@ -1,3 +1,4 @@
+//go:build tinygo.wasm
 // +build tinygo.wasm
 
 package runtime
diff --git a/src/runtime/arch_xtensa.go b/src/runtime/arch_xtensa.go
index 6e6a5a35..c9598922 100644
--- a/src/runtime/arch_xtensa.go
+++ b/src/runtime/arch_xtensa.go
@@ -1,3 +1,4 @@
+//go:build xtensa
 // +build xtensa
 
 package runtime
diff --git a/src/runtime/baremetal.go b/src/runtime/baremetal.go
index e17edcbf..b91fdb29 100644
--- a/src/runtime/baremetal.go
+++ b/src/runtime/baremetal.go
@@ -1,3 +1,4 @@
+//go:build baremetal
 // +build baremetal
 
 package runtime
diff --git a/src/runtime/cond.go b/src/runtime/cond.go
index 76d3a377..e382adb8 100644
--- a/src/runtime/cond.go
+++ b/src/runtime/cond.go
@@ -1,3 +1,4 @@
+//go:build !scheduler.none
 // +build !scheduler.none
 
 package runtime
diff --git a/src/runtime/cond_nosched.go b/src/runtime/cond_nosched.go
index 585b7693..f999a56c 100644
--- a/src/runtime/cond_nosched.go
+++ b/src/runtime/cond_nosched.go
@@ -1,3 +1,4 @@
+//go:build scheduler.none
 // +build scheduler.none
 
 package runtime
diff --git a/src/runtime/env_linux.go b/src/runtime/env_linux.go
index 5d2164e1..2d0a7ea5 100644
--- a/src/runtime/env_linux.go
+++ b/src/runtime/env_linux.go
@@ -1,3 +1,4 @@
+//go:build linux
 // +build linux
 
 package runtime
diff --git a/src/runtime/gc_leaking.go b/src/runtime/gc_leaking.go
index 47b7d4fa..b2abfd0c 100644
--- a/src/runtime/gc_leaking.go
+++ b/src/runtime/gc_leaking.go
@@ -1,3 +1,4 @@
+//go:build gc.leaking
 // +build gc.leaking
 
 package runtime
diff --git a/src/runtime/gc_none.go b/src/runtime/gc_none.go
index f769a07f..fc791008 100644
--- a/src/runtime/gc_none.go
+++ b/src/runtime/gc_none.go
@@ -1,3 +1,4 @@
+//go:build gc.none
 // +build gc.none
 
 package runtime
diff --git a/src/runtime/hosted.go b/src/runtime/hosted.go
index 935885de..72eb1149 100644
--- a/src/runtime/hosted.go
+++ b/src/runtime/hosted.go
@@ -1,3 +1,4 @@
+//go:build !baremetal
 // +build !baremetal
 
 package runtime
diff --git a/src/runtime/interrupt/interrupt_avr.go b/src/runtime/interrupt/interrupt_avr.go
index 6eb6b28f..29575783 100644
--- a/src/runtime/interrupt/interrupt_avr.go
+++ b/src/runtime/interrupt/interrupt_avr.go
@@ -1,3 +1,4 @@
+//go:build avr
 // +build avr
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_cortexm.go b/src/runtime/interrupt/interrupt_cortexm.go
index 0653cb69..131e9ede 100644
--- a/src/runtime/interrupt/interrupt_cortexm.go
+++ b/src/runtime/interrupt/interrupt_cortexm.go
@@ -1,3 +1,4 @@
+//go:build cortexm
 // +build cortexm
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_esp32c3.go b/src/runtime/interrupt/interrupt_esp32c3.go
index a3781488..6a1e3291 100644
--- a/src/runtime/interrupt/interrupt_esp32c3.go
+++ b/src/runtime/interrupt/interrupt_esp32c3.go
@@ -1,3 +1,4 @@
+//go:build esp32c3
 // +build esp32c3
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_gameboyadvance.go b/src/runtime/interrupt/interrupt_gameboyadvance.go
index b0055070..0437f9ed 100644
--- a/src/runtime/interrupt/interrupt_gameboyadvance.go
+++ b/src/runtime/interrupt/interrupt_gameboyadvance.go
@@ -1,3 +1,4 @@
+//go:build gameboyadvance
 // +build gameboyadvance
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_k210.go b/src/runtime/interrupt/interrupt_k210.go
index 31e056c1..4f987171 100644
--- a/src/runtime/interrupt/interrupt_k210.go
+++ b/src/runtime/interrupt/interrupt_k210.go
@@ -1,3 +1,4 @@
+//go:build k210
 // +build k210
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_none.go b/src/runtime/interrupt/interrupt_none.go
index 89109304..136d3570 100644
--- a/src/runtime/interrupt/interrupt_none.go
+++ b/src/runtime/interrupt/interrupt_none.go
@@ -1,3 +1,4 @@
+//go:build !baremetal
 // +build !baremetal
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_sifive.go b/src/runtime/interrupt/interrupt_sifive.go
index 1af18ec2..4be3ee6a 100644
--- a/src/runtime/interrupt/interrupt_sifive.go
+++ b/src/runtime/interrupt/interrupt_sifive.go
@@ -1,3 +1,4 @@
+//go:build sifive
 // +build sifive
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_tinygoriscv.go b/src/runtime/interrupt/interrupt_tinygoriscv.go
index 0161018d..da296419 100644
--- a/src/runtime/interrupt/interrupt_tinygoriscv.go
+++ b/src/runtime/interrupt/interrupt_tinygoriscv.go
@@ -1,3 +1,4 @@
+//go:build tinygo.riscv
 // +build tinygo.riscv
 
 package interrupt
diff --git a/src/runtime/interrupt/interrupt_xtensa.go b/src/runtime/interrupt/interrupt_xtensa.go
index dfcbc7db..67f4d812 100644
--- a/src/runtime/interrupt/interrupt_xtensa.go
+++ b/src/runtime/interrupt/interrupt_xtensa.go
@@ -1,3 +1,4 @@
+//go:build xtensa
 // +build xtensa
 
 package interrupt
diff --git a/src/runtime/mstats.go b/src/runtime/mstats.go
index d2723fe9..38596dce 100644
--- a/src/runtime/mstats.go
+++ b/src/runtime/mstats.go
@@ -1,3 +1,4 @@
+//go:build gc.conservative
 // +build gc.conservative
 
 package runtime
diff --git a/src/runtime/nonhosted.go b/src/runtime/nonhosted.go
index 531c1c1e..010b7c4c 100644
--- a/src/runtime/nonhosted.go
+++ b/src/runtime/nonhosted.go
@@ -1,3 +1,4 @@
+//go:build baremetal || js
 // +build baremetal js
 
 package runtime
diff --git a/src/runtime/os_darwin.go b/src/runtime/os_darwin.go
index be878909..d485f042 100644
--- a/src/runtime/os_darwin.go
+++ b/src/runtime/os_darwin.go
@@ -1,3 +1,4 @@
+//go:build darwin
 // +build darwin
 
 package runtime
diff --git a/src/runtime/os_js.go b/src/runtime/os_js.go
index 422b1d32..d4000108 100644
--- a/src/runtime/os_js.go
+++ b/src/runtime/os_js.go
@@ -1,3 +1,4 @@
+//go:build js
 // +build js
 
 package runtime
diff --git a/src/runtime/os_linux.go b/src/runtime/os_linux.go
index aa056173..2d5f5e64 100644
--- a/src/runtime/os_linux.go
+++ b/src/runtime/os_linux.go
@@ -1,3 +1,4 @@
+//go:build linux
 // +build linux
 
 package runtime
diff --git a/src/runtime/runtime_arm7tdmi.go b/src/runtime/runtime_arm7tdmi.go
index 3b383c32..61b67264 100644
--- a/src/runtime/runtime_arm7tdmi.go
+++ b/src/runtime/runtime_arm7tdmi.go
@@ -1,3 +1,4 @@
+//go:build arm7tdmi
 // +build arm7tdmi
 
 package runtime
diff --git a/src/runtime/runtime_atmega.go b/src/runtime/runtime_atmega.go
index 3c3d57bc..b62a50a0 100644
--- a/src/runtime/runtime_atmega.go
+++ b/src/runtime/runtime_atmega.go
@@ -1,3 +1,4 @@
+//go:build avr && atmega
 // +build avr,atmega
 
 package runtime
diff --git a/src/runtime/runtime_atsamd21.go b/src/runtime/runtime_atsamd21.go
index c4147c80..3f66ad2f 100644
--- a/src/runtime/runtime_atsamd21.go
+++ b/src/runtime/runtime_atsamd21.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21
 // +build sam,atsamd21
 
 package runtime
diff --git a/src/runtime/runtime_atsamd21e18.go b/src/runtime/runtime_atsamd21e18.go
index 8127881f..2ad6eae9 100644
--- a/src/runtime/runtime_atsamd21e18.go
+++ b/src/runtime/runtime_atsamd21e18.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && atsamd21e18
 // +build sam,atsamd21,atsamd21e18
 
 package runtime
diff --git a/src/runtime/runtime_atsamd21g18.go b/src/runtime/runtime_atsamd21g18.go
index 8c2cf416..46938734 100644
--- a/src/runtime/runtime_atsamd21g18.go
+++ b/src/runtime/runtime_atsamd21g18.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd21 && atsamd21g18
 // +build sam,atsamd21,atsamd21g18
 
 package runtime
diff --git a/src/runtime/runtime_atsamd51.go b/src/runtime/runtime_atsamd51.go
index 3561050b..ed2aa9c3 100644
--- a/src/runtime/runtime_atsamd51.go
+++ b/src/runtime/runtime_atsamd51.go
@@ -1,3 +1,4 @@
+//go:build (sam && atsamd51) || (sam && atsame5x)
 // +build sam,atsamd51 sam,atsame5x
 
 package runtime
diff --git a/src/runtime/runtime_atsamd51g19.go b/src/runtime/runtime_atsamd51g19.go
index 636c6dcd..c8aed717 100644
--- a/src/runtime/runtime_atsamd51g19.go
+++ b/src/runtime/runtime_atsamd51g19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51g19
 // +build sam,atsamd51,atsamd51g19
 
 package runtime
diff --git a/src/runtime/runtime_atsamd51j19.go b/src/runtime/runtime_atsamd51j19.go
index 94e4742e..b3e1db0f 100644
--- a/src/runtime/runtime_atsamd51j19.go
+++ b/src/runtime/runtime_atsamd51j19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51j19
 // +build sam,atsamd51,atsamd51j19
 
 package runtime
diff --git a/src/runtime/runtime_atsamd51j20.go b/src/runtime/runtime_atsamd51j20.go
index a068a08c..af50349e 100644
--- a/src/runtime/runtime_atsamd51j20.go
+++ b/src/runtime/runtime_atsamd51j20.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51j20
 // +build sam,atsamd51,atsamd51j20
 
 package runtime
diff --git a/src/runtime/runtime_atsamd51p19.go b/src/runtime/runtime_atsamd51p19.go
index 43078cb4..07c220fc 100644
--- a/src/runtime/runtime_atsamd51p19.go
+++ b/src/runtime/runtime_atsamd51p19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51p19
 // +build sam,atsamd51,atsamd51p19
 
 package runtime
diff --git a/src/runtime/runtime_atsamd51p20.go b/src/runtime/runtime_atsamd51p20.go
index 2fb38e79..83562101 100644
--- a/src/runtime/runtime_atsamd51p20.go
+++ b/src/runtime/runtime_atsamd51p20.go
@@ -1,3 +1,4 @@
+//go:build sam && atsamd51 && atsamd51p20
 // +build sam,atsamd51,atsamd51p20
 
 package runtime
diff --git a/src/runtime/runtime_atsame51j19.go b/src/runtime/runtime_atsame51j19.go
index 76dce733..907b95be 100644
--- a/src/runtime/runtime_atsame51j19.go
+++ b/src/runtime/runtime_atsame51j19.go
@@ -1,3 +1,4 @@
+//go:build sam && atsame51 && atsame51j19
 // +build sam,atsame51,atsame51j19
 
 package runtime
diff --git a/src/runtime/runtime_atsame54p20.go b/src/runtime/runtime_atsame54p20.go
index 7c2981ac..34a28153 100644
--- a/src/runtime/runtime_atsame54p20.go
+++ b/src/runtime/runtime_atsame54p20.go
@@ -1,3 +1,4 @@
+//go:build sam && atsame5x && atsame54p20
 // +build sam,atsame5x,atsame54p20
 
 package runtime
diff --git a/src/runtime/runtime_atsame5x_can.go b/src/runtime/runtime_atsame5x_can.go
index db778b0a..dc1fc2ab 100644
--- a/src/runtime/runtime_atsame5x_can.go
+++ b/src/runtime/runtime_atsame5x_can.go
@@ -1,3 +1,4 @@
+//go:build (sam && atsame51) || (sam && atsame54)
 // +build sam,atsame51 sam,atsame54
 
 package runtime
diff --git a/src/runtime/runtime_attiny.go b/src/runtime/runtime_attiny.go
index 9f783937..7683fcac 100644
--- a/src/runtime/runtime_attiny.go
+++ b/src/runtime/runtime_attiny.go
@@ -1,3 +1,4 @@
+//go:build avr && attiny
 // +build avr,attiny
 
 package runtime
diff --git a/src/runtime/runtime_cortexm.go b/src/runtime/runtime_cortexm.go
index ae20f7de..e718344f 100644
--- a/src/runtime/runtime_cortexm.go
+++ b/src/runtime/runtime_cortexm.go
@@ -1,3 +1,4 @@
+//go:build cortexm
 // +build cortexm
 
 package runtime
diff --git a/src/runtime/runtime_cortexm_abort.go b/src/runtime/runtime_cortexm_abort.go
index 861d330a..584c0c22 100644
--- a/src/runtime/runtime_cortexm_abort.go
+++ b/src/runtime/runtime_cortexm_abort.go
@@ -1,3 +1,4 @@
+//go:build cortexm && !nxp && !qemu
 // +build cortexm,!nxp,!qemu
 
 package runtime
diff --git a/src/runtime/runtime_cortexm_hardfault.go b/src/runtime/runtime_cortexm_hardfault.go
index 7d1969f1..8c56bbd9 100644
--- a/src/runtime/runtime_cortexm_hardfault.go
+++ b/src/runtime/runtime_cortexm_hardfault.go
@@ -1,3 +1,4 @@
+//go:build atsamd21 || nrf51
 // +build atsamd21 nrf51
 
 package runtime
diff --git a/src/runtime/runtime_cortexm_hardfault_debug.go b/src/runtime/runtime_cortexm_hardfault_debug.go
index f136d710..ee5e97ea 100644
--- a/src/runtime/runtime_cortexm_hardfault_debug.go
+++ b/src/runtime/runtime_cortexm_hardfault_debug.go
@@ -1,3 +1,4 @@
+//go:build cortexm && !atsamd21 && !nrf51
 // +build cortexm,!atsamd21,!nrf51
 
 package runtime
diff --git a/src/runtime/runtime_cortexm_qemu.go b/src/runtime/runtime_cortexm_qemu.go
index 07eef706..5f37b062 100644
--- a/src/runtime/runtime_cortexm_qemu.go
+++ b/src/runtime/runtime_cortexm_qemu.go
@@ -1,3 +1,4 @@
+//go:build cortexm && qemu
 // +build cortexm,qemu
 
 package runtime
diff --git a/src/runtime/runtime_esp32.go b/src/runtime/runtime_esp32.go
index 7855e2d6..96d86af6 100644
--- a/src/runtime/runtime_esp32.go
+++ b/src/runtime/runtime_esp32.go
@@ -1,3 +1,4 @@
+//go:build esp32
 // +build esp32
 
 package runtime
diff --git a/src/runtime/runtime_esp32c3.go b/src/runtime/runtime_esp32c3.go
index 38c9ac2c..fd0107c9 100644
--- a/src/runtime/runtime_esp32c3.go
+++ b/src/runtime/runtime_esp32c3.go
@@ -1,3 +1,4 @@
+//go:build esp32c3
 // +build esp32c3
 
 package runtime
diff --git a/src/runtime/runtime_esp32xx.go b/src/runtime/runtime_esp32xx.go
index b3270ac3..79507a51 100644
--- a/src/runtime/runtime_esp32xx.go
+++ b/src/runtime/runtime_esp32xx.go
@@ -1,3 +1,4 @@
+//go:build esp32 || esp32c3
 // +build esp32 esp32c3
 
 package runtime
diff --git a/src/runtime/runtime_esp8266.go b/src/runtime/runtime_esp8266.go
index 936b99a4..7ec75c82 100644
--- a/src/runtime/runtime_esp8266.go
+++ b/src/runtime/runtime_esp8266.go
@@ -1,3 +1,4 @@
+//go:build esp8266
 // +build esp8266
 
 package runtime
diff --git a/src/runtime/runtime_fe310.go b/src/runtime/runtime_fe310.go
index c09dfe81..5999396b 100644
--- a/src/runtime/runtime_fe310.go
+++ b/src/runtime/runtime_fe310.go
@@ -1,3 +1,4 @@
+//go:build fe310
 // +build fe310
 
 // This file implements target-specific things for the FE310 chip as used in the
diff --git a/src/runtime/runtime_fe310_baremetal.go b/src/runtime/runtime_fe310_baremetal.go
index 7750e7bb..5c393740 100644
--- a/src/runtime/runtime_fe310_baremetal.go
+++ b/src/runtime/runtime_fe310_baremetal.go
@@ -1,3 +1,4 @@
+//go:build fe310 && !qemu
 // +build fe310,!qemu
 
 package runtime
diff --git a/src/runtime/runtime_fe310_qemu.go b/src/runtime/runtime_fe310_qemu.go
index 98614736..42ba0c31 100644
--- a/src/runtime/runtime_fe310_qemu.go
+++ b/src/runtime/runtime_fe310_qemu.go
@@ -1,3 +1,4 @@
+//go:build fe310 && qemu
 // +build fe310,qemu
 
 package runtime
diff --git a/src/runtime/runtime_k210.go b/src/runtime/runtime_k210.go
index 2fb4fec6..6cdea759 100644
--- a/src/runtime/runtime_k210.go
+++ b/src/runtime/runtime_k210.go
@@ -1,3 +1,4 @@
+//go:build k210
 // +build k210
 
 // This file implements target-specific things for the K210 chip as used in the
diff --git a/src/runtime/runtime_k210_baremetal.go b/src/runtime/runtime_k210_baremetal.go
index 2b4f46cc..160d6411 100644
--- a/src/runtime/runtime_k210_baremetal.go
+++ b/src/runtime/runtime_k210_baremetal.go
@@ -1,3 +1,4 @@
+//go:build k210 && !qemu
 // +build k210,!qemu
 
 package runtime
diff --git a/src/runtime/runtime_mimxrt1062.go b/src/runtime/runtime_mimxrt1062.go
index 8a9f2b01..abd95f4d 100644
--- a/src/runtime/runtime_mimxrt1062.go
+++ b/src/runtime/runtime_mimxrt1062.go
@@ -1,3 +1,4 @@
+//go:build mimxrt1062
 // +build mimxrt1062
 
 package runtime
diff --git a/src/runtime/runtime_mimxrt1062_clock.go b/src/runtime/runtime_mimxrt1062_clock.go
index 3a576198..9dcca934 100644
--- a/src/runtime/runtime_mimxrt1062_clock.go
+++ b/src/runtime/runtime_mimxrt1062_clock.go
@@ -1,3 +1,4 @@
+//go:build mimxrt1062
 // +build mimxrt1062
 
 package runtime
diff --git a/src/runtime/runtime_mimxrt1062_mpu.go b/src/runtime/runtime_mimxrt1062_mpu.go
index cd71dd84..1ceb9842 100644
--- a/src/runtime/runtime_mimxrt1062_mpu.go
+++ b/src/runtime/runtime_mimxrt1062_mpu.go
@@ -1,3 +1,4 @@
+//go:build mimxrt1062
 // +build mimxrt1062
 
 package runtime
diff --git a/src/runtime/runtime_mimxrt1062_time.go b/src/runtime/runtime_mimxrt1062_time.go
index 22f29d17..9c4101be 100644
--- a/src/runtime/runtime_mimxrt1062_time.go
+++ b/src/runtime/runtime_mimxrt1062_time.go
@@ -1,3 +1,4 @@
+//go:build mimxrt1062
 // +build mimxrt1062
 
 package runtime
diff --git a/src/runtime/runtime_nintendoswitch.go b/src/runtime/runtime_nintendoswitch.go
index 0267b541..6433c6b6 100644
--- a/src/runtime/runtime_nintendoswitch.go
+++ b/src/runtime/runtime_nintendoswitch.go
@@ -1,3 +1,4 @@
+//go:build nintendoswitch
 // +build nintendoswitch
 
 package runtime
diff --git a/src/runtime/runtime_nrf.go b/src/runtime/runtime_nrf.go
index dfbc76e1..9da4caf3 100644
--- a/src/runtime/runtime_nrf.go
+++ b/src/runtime/runtime_nrf.go
@@ -1,3 +1,4 @@
+//go:build nrf
 // +build nrf
 
 package runtime
diff --git a/src/runtime/runtime_nrf_bare.go b/src/runtime/runtime_nrf_bare.go
index 97300410..51035e21 100644
--- a/src/runtime/runtime_nrf_bare.go
+++ b/src/runtime/runtime_nrf_bare.go
@@ -1,3 +1,4 @@
+//go:build nrf && !softdevice
 // +build nrf,!softdevice
 
 package runtime
diff --git a/src/runtime/runtime_nrf_softdevice.go b/src/runtime/runtime_nrf_softdevice.go
index b1c97033..5da3776f 100644
--- a/src/runtime/runtime_nrf_softdevice.go
+++ b/src/runtime/runtime_nrf_softdevice.go
@@ -1,3 +1,4 @@
+//go:build nrf && softdevice
 // +build nrf,softdevice
 
 package runtime
diff --git a/src/runtime/runtime_nxpmk66f18.go b/src/runtime/runtime_nxpmk66f18.go
index 02a9bb59..05643d71 100644
--- a/src/runtime/runtime_nxpmk66f18.go
+++ b/src/runtime/runtime_nxpmk66f18.go
@@ -27,6 +27,7 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+//go:build nxp && mk66f18
 // +build nxp,mk66f18
 
 package runtime
diff --git a/src/runtime/runtime_rp2040.go b/src/runtime/runtime_rp2040.go
index 38f6d304..1de9dd08 100644
--- a/src/runtime/runtime_rp2040.go
+++ b/src/runtime/runtime_rp2040.go
@@ -1,3 +1,4 @@
+//go:build rp2040
 // +build rp2040
 
 package runtime
diff --git a/src/runtime/runtime_stm32.go b/src/runtime/runtime_stm32.go
index aabffa2a..7fb332f9 100644
--- a/src/runtime/runtime_stm32.go
+++ b/src/runtime/runtime_stm32.go
@@ -1,3 +1,4 @@
+//go:build stm32
 // +build stm32
 
 package runtime
diff --git a/src/runtime/runtime_stm32_timers.go b/src/runtime/runtime_stm32_timers.go
index f181eed6..81b728f7 100644
--- a/src/runtime/runtime_stm32_timers.go
+++ b/src/runtime/runtime_stm32_timers.go
@@ -1,3 +1,4 @@
+//go:build stm32
 // +build stm32
 
 package runtime
diff --git a/src/runtime/runtime_stm32f103.go b/src/runtime/runtime_stm32f103.go
index 44e103bc..c0cd7fa4 100644
--- a/src/runtime/runtime_stm32f103.go
+++ b/src/runtime/runtime_stm32f103.go
@@ -1,3 +1,4 @@
+//go:build stm32 && stm32f103
 // +build stm32,stm32f103
 
 package runtime
diff --git a/src/runtime/runtime_stm32f405.go b/src/runtime/runtime_stm32f405.go
index 26d19f79..ce8e9ef5 100644
--- a/src/runtime/runtime_stm32f405.go
+++ b/src/runtime/runtime_stm32f405.go
@@ -1,3 +1,4 @@
+//go:build stm32f405
 // +build stm32f405
 
 package runtime
diff --git a/src/runtime/runtime_stm32f7x2.go b/src/runtime/runtime_stm32f7x2.go
index b2996197..29fe173c 100644
--- a/src/runtime/runtime_stm32f7x2.go
+++ b/src/runtime/runtime_stm32f7x2.go
@@ -1,3 +1,4 @@
+//go:build stm32 && stm32f7x2
 // +build stm32,stm32f7x2
 
 package runtime
diff --git a/src/runtime/runtime_stm32l0.go b/src/runtime/runtime_stm32l0.go
index f6b66b3b..bee860ab 100644
--- a/src/runtime/runtime_stm32l0.go
+++ b/src/runtime/runtime_stm32l0.go
@@ -1,3 +1,4 @@
+//go:build stm32l0
 // +build stm32l0
 
 package runtime
diff --git a/src/runtime/runtime_stm32l0x1.go b/src/runtime/runtime_stm32l0x1.go
index 3fd5288e..dfc30f4c 100644
--- a/src/runtime/runtime_stm32l0x1.go
+++ b/src/runtime/runtime_stm32l0x1.go
@@ -1,3 +1,4 @@
+//go:build stm32l0x1
 // +build stm32l0x1
 
 package runtime
diff --git a/src/runtime/runtime_stm32l0x2.go b/src/runtime/runtime_stm32l0x2.go
index 89398ff5..4021e495 100644
--- a/src/runtime/runtime_stm32l0x2.go
+++ b/src/runtime/runtime_stm32l0x2.go
@@ -1,3 +1,4 @@
+//go:build stm32l0x2
 // +build stm32l0x2
 
 package runtime
diff --git a/src/runtime/runtime_stm32l5x2.go b/src/runtime/runtime_stm32l5x2.go
index 88e45c27..73d0cc0b 100644
--- a/src/runtime/runtime_stm32l5x2.go
+++ b/src/runtime/runtime_stm32l5x2.go
@@ -1,3 +1,4 @@
+//go:build stm32 && stm32l5x2
 // +build stm32,stm32l5x2
 
 package runtime
diff --git a/src/runtime/runtime_tinygoriscv.go b/src/runtime/runtime_tinygoriscv.go
index 857b93a7..1778749e 100644
--- a/src/runtime/runtime_tinygoriscv.go
+++ b/src/runtime/runtime_tinygoriscv.go
@@ -1,3 +1,4 @@
+//go:build tinygo.riscv32
 // +build tinygo.riscv32
 
 package runtime
diff --git a/src/runtime/runtime_tinygoriscv64.go b/src/runtime/runtime_tinygoriscv64.go
index d995efce..020dfc7f 100644
--- a/src/runtime/runtime_tinygoriscv64.go
+++ b/src/runtime/runtime_tinygoriscv64.go
@@ -1,3 +1,4 @@
+//go:build tinygo.riscv64
 // +build tinygo.riscv64
 
 package runtime
diff --git a/src/runtime/runtime_tinygoriscv_qemu.go b/src/runtime/runtime_tinygoriscv_qemu.go
index 8558f41e..18556e04 100644
--- a/src/runtime/runtime_tinygoriscv_qemu.go
+++ b/src/runtime/runtime_tinygoriscv_qemu.go
@@ -1,3 +1,4 @@
+//go:build tinygo.riscv && virt && qemu
 // +build tinygo.riscv,virt,qemu
 
 package runtime
diff --git a/src/runtime/runtime_tinygowasm.go b/src/runtime/runtime_tinygowasm.go
index a5b1b3c8..9e7d369e 100644
--- a/src/runtime/runtime_tinygowasm.go
+++ b/src/runtime/runtime_tinygowasm.go
@@ -1,3 +1,4 @@
+//go:build tinygo.wasm
 // +build tinygo.wasm
 
 package runtime
diff --git a/src/runtime/runtime_wasm_wasi.go b/src/runtime/runtime_wasm_wasi.go
index 96174e80..65827862 100644
--- a/src/runtime/runtime_wasm_wasi.go
+++ b/src/runtime/runtime_wasm_wasi.go
@@ -1,3 +1,4 @@
+//go:build tinygo.wasm && wasi
 // +build tinygo.wasm,wasi
 
 package runtime
diff --git a/src/runtime/scheduler_tasks.go b/src/runtime/scheduler_tasks.go
index 03009b34..67b47549 100644
--- a/src/runtime/scheduler_tasks.go
+++ b/src/runtime/scheduler_tasks.go
@@ -1,3 +1,4 @@
+//go:build scheduler.tasks
 // +build scheduler.tasks
 
 package runtime
diff --git a/src/runtime/time_nxpmk66f18.go b/src/runtime/time_nxpmk66f18.go
index 3836fc39..c0b876ed 100644
--- a/src/runtime/time_nxpmk66f18.go
+++ b/src/runtime/time_nxpmk66f18.go
@@ -27,6 +27,7 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+//go:build nxp && mk66f18
 // +build nxp,mk66f18
 
 package runtime
diff --git a/src/runtime/volatile/bitband_nxpmk66f18.go b/src/runtime/volatile/bitband_nxpmk66f18.go
index 0a4904db..b85a9495 100644
--- a/src/runtime/volatile/bitband_nxpmk66f18.go
+++ b/src/runtime/volatile/bitband_nxpmk66f18.go
@@ -1,3 +1,4 @@
+//go:build nxp && mk66f18
 // +build nxp,mk66f18
 
 package volatile
diff --git a/src/runtime/wait_other.go b/src/runtime/wait_other.go
index 20f418d3..1807a76e 100644
--- a/src/runtime/wait_other.go
+++ b/src/runtime/wait_other.go
@@ -1,5 +1,5 @@
-// +build !tinygo.riscv
-// +build !cortexm
+//go:build !tinygo.riscv && !cortexm
+// +build !tinygo.riscv,!cortexm
 
 package runtime
 
diff --git a/src/syscall/errno_other.go b/src/syscall/errno_other.go
index c18aa6cd..3e9374b9 100644
--- a/src/syscall/errno_other.go
+++ b/src/syscall/errno_other.go
@@ -1,3 +1,4 @@
+//go:build !wasi && !darwin
 // +build !wasi,!darwin
 
 package syscall
diff --git a/src/syscall/file_emulated.go b/src/syscall/file_emulated.go
index 1fe1103b..b1859bb1 100644
--- a/src/syscall/file_emulated.go
+++ b/src/syscall/file_emulated.go
@@ -1,3 +1,4 @@
+//go:build baremetal || wasm
 // +build baremetal wasm
 
 // This file emulates some file-related functions that are only available
diff --git a/src/syscall/file_hosted.go b/src/syscall/file_hosted.go
index 45b657d1..f11081c3 100644
--- a/src/syscall/file_hosted.go
+++ b/src/syscall/file_hosted.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !wasm
 // +build !baremetal,!wasm
 
 // This file assumes there is a libc available that runs on a real operating
diff --git a/src/syscall/proc_emulated.go b/src/syscall/proc_emulated.go
index 89b22e81..4ed0b44c 100644
--- a/src/syscall/proc_emulated.go
+++ b/src/syscall/proc_emulated.go
@@ -1,3 +1,4 @@
+//go:build baremetal || wasi || wasm
 // +build baremetal wasi wasm
 
 // This file emulates some process-related functions that are only available
diff --git a/src/syscall/proc_hosted.go b/src/syscall/proc_hosted.go
index 5f52a4ca..2ec99ac5 100644
--- a/src/syscall/proc_hosted.go
+++ b/src/syscall/proc_hosted.go
@@ -1,3 +1,4 @@
+//go:build !baremetal && !wasi && !wasm
 // +build !baremetal,!wasi,!wasm
 
 // This file assumes there is a libc available that runs on a real operating
diff --git a/src/syscall/syscall_libc.go b/src/syscall/syscall_libc.go
index 496044f2..da46b9ff 100644
--- a/src/syscall/syscall_libc.go
+++ b/src/syscall/syscall_libc.go
@@ -1,3 +1,4 @@
+//go:build darwin || nintendoswitch || wasi
 // +build darwin nintendoswitch wasi
 
 package syscall
diff --git a/src/syscall/syscall_libc_darwin.go b/src/syscall/syscall_libc_darwin.go
index 93201fc7..ac89f74e 100644
--- a/src/syscall/syscall_libc_darwin.go
+++ b/src/syscall/syscall_libc_darwin.go
@@ -1,3 +1,4 @@
+//go:build darwin
 // +build darwin
 
 package syscall
diff --git a/src/syscall/syscall_libc_nintendoswitch.go b/src/syscall/syscall_libc_nintendoswitch.go
index 2ff8de04..876f125c 100644
--- a/src/syscall/syscall_libc_nintendoswitch.go
+++ b/src/syscall/syscall_libc_nintendoswitch.go
@@ -1,3 +1,4 @@
+//go:build nintendoswitch
 // +build nintendoswitch
 
 package syscall
diff --git a/src/syscall/syscall_libc_wasi.go b/src/syscall/syscall_libc_wasi.go
index ef3a7fa2..a19420d7 100644
--- a/src/syscall/syscall_libc_wasi.go
+++ b/src/syscall/syscall_libc_wasi.go
@@ -1,3 +1,4 @@
+//go:build wasi
 // +build wasi
 
 package syscall
diff --git a/src/syscall/syscall_nonhosted.go b/src/syscall/syscall_nonhosted.go
index be1b32c7..2f590f2b 100644
--- a/src/syscall/syscall_nonhosted.go
+++ b/src/syscall/syscall_nonhosted.go
@@ -1,3 +1,4 @@
+//go:build baremetal || js
 // +build baremetal js
 
 package syscall
diff --git a/src/syscall/tables_nonhosted.go b/src/syscall/tables_nonhosted.go
index a78eb75f..ae0c7cc5 100644
--- a/src/syscall/tables_nonhosted.go
+++ b/src/syscall/tables_nonhosted.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build baremetal || nintendoswitch || js
 // +build baremetal nintendoswitch js
 
 package syscall
diff --git a/util_unix.go b/util_unix.go
index 8be8eb2c..47a3a2c3 100644
--- a/util_unix.go
+++ b/util_unix.go
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package main