clutter-gtk: add updateScript

pkgs/development/libraries/clutter-gtk/default.nix

···
-{ fetchurl, stdenv, pkgconfig, gobjectIntrospection, clutter, gtk3 }:
-
+{ fetchurl, stdenv, pkgconfig, gobjectIntrospection, clutter, gtk3, gnome3 }:
+let
+  pname = "clutter-gtk";
+  version = "1.8.4";
+in
 stdenv.mkDerivation rec {
-  major = "1.8";
-  minor = "4";
-  name = "clutter-gtk-${major}.${minor}";
+  name = "${pname}-${version}";
 
   src = fetchurl {
-    url = "mirror://gnome/sources/clutter-gtk/${major}/${name}.tar.xz";
+    url = "mirror://gnome/sources/${pname}/${gnome3.versionBranch version}/${name}.tar.xz";
     sha256 = "01ibniy4ich0fgpam53q252idm7f4fn5xg5qvizcfww90gn9652j";
   };
 
···
   nativeBuildInputs = [ pkgconfig gobjectIntrospection ];
 
   postBuild = "rm -rf $out/share/gtk-doc";
+
+  passthru = {
+    updateScript = gnome3.updateScript {
+      packageName = pname;
+    };
+  };
 
   meta = {
     description = "Clutter-GTK";