diff --git a/pkgs/tools/misc/uucp/default.nix b/pkgs/tools/misc/uucp/default.nix
index 39368da68be..acb42a7a8d2 100644
--- a/pkgs/tools/misc/uucp/default.nix
+++ b/pkgs/tools/misc/uucp/default.nix
@@ -11,6 +11,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   prePatch = ''
+    # do not set sticky bit in nix store
     substituteInPlace Makefile.in \
       --replace 4555 0555
     sed -i '/chown $(OWNER)/d' Makefile.in