diff --git a/pkgs/applications/misc/udevil/default.nix b/pkgs/applications/misc/udevil/default.nix
index 83ebef7f10d..9a4b795061b 100644
--- a/pkgs/applications/misc/udevil/default.nix
+++ b/pkgs/applications/misc/udevil/default.nix
@@ -8,6 +8,7 @@ stdenv.mkDerivation {
   buildInputs = [ intltool glib pkgconfig udev ];
   configurePhase = ''
     substituteInPlace src/Makefile.in --replace "-o root -g root" ""
+    # do not set setuid bit in nix store
     substituteInPlace src/Makefile.in --replace 4755 0755
     ./configure \
       --prefix=$out \