diff --git a/build/toolchain/musl-host-gcc/README.md b/build/toolchain/musl-host-gcc/README.md
index 5154107..4c3aeba 100644
--- a/build/toolchain/musl-host-gcc/README.md
+++ b/build/toolchain/musl-host-gcc/README.md
@@ -26,6 +26,8 @@
     bazel build //build/toolchain/musl-host-gcc/sysroot
     cp -f bazel-bin/build/toolchain/musl-host-gcc/sysroot/sysroot.tar.xz build/toolchain/musl-host-gcc/sysroot.tar.xz
 
+As a temporary hack the compiler-specific headers of our current development container have been manually merged in. This is expected to be replaced by a proper LLVM-based toolchain.
+
 Internals
 ---------