diff --git a/flake.nix b/flake.nix
index ec4f34fa..b98612d3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -51,6 +51,7 @@
             go
             llvmPackages_17.llvm
             llvmPackages_17.libclang
+            llvmPackages_17.libcxx
             # Additional dependencies needed at runtime, for building and/or
             # flashing.
             llvmPackages_17.lld