diff --git a/Makefile b/Makefile
index 1c6d8c8f..7fa1c332 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ tgo: build/tgo
 .PHONY: all tgo run-hello run-blinky flash-blinky clean gen-device gen-device-nrf
 
 # Custom LLVM toolchain.
-LLVM =
+LLVM := $(shell go env GOPATH)/src/llvm.org/llvm/bindings/go/llvm/workdir/llvm_build/bin/
 LINK = $(LLVM)llvm-link
 LLC = $(LLVM)llc