diff --git a/pkgs/development/compilers/llvm/14/clang/default.nix b/pkgs/development/compilers/llvm/14/clang/default.nix
index 9544494b356e..5ff02d68de42 100644
--- a/pkgs/development/compilers/llvm/14/clang/default.nix
+++ b/pkgs/development/compilers/llvm/14/clang/default.nix
@@ -15,6 +15,7 @@ let
       mkdir -p "$out"
       cp -r ${monorepoSrc}/cmake "$out"
       cp -r ${monorepoSrc}/${pname} "$out"
+      cp -r ${monorepoSrc}/clang-tools-extra "$out"
     '';
 
     sourceRoot = "${src.name}/${pname}";