diff --git a/pkgs/tools/misc/unclutter/default.nix b/pkgs/tools/misc/unclutter/default.nix
index d8731f764b33..a8468f8387f2 100644
--- a/pkgs/tools/misc/unclutter/default.nix
+++ b/pkgs/tools/misc/unclutter/default.nix
@@ -9,6 +9,8 @@ stdenv.mkDerivation {
 
   buildInputs = [xlibsWrapper];
 
+  buildFlags = [ "CC=cc" ];
+
   installPhase = ''
     mkdir -pv "$out/bin"
     mkdir -pv "$out/share/man/man1"