anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gtk4";
  -  version = "4.6.3";
  +  version = "4.6.4";
   
     outputs = [ "out" "dev" ] ++ lib.optionals x11Support [ "devdoc" ];
     outputBin = "dev";
  
positive.code: , stdenv
  , substituteAll
  , fetchurl
  , fetchpatch
  , pkg-config
  , gettext
  , graphene
  
negative.code: 
    src = fetchurl {
      url = "mirror://gnome/sources/gtk/${lib.versions.majorMinor version}/gtk-${version}.tar.xz";
      sha256 = "p5orvMeTG3A/xPofy+G5BuIpoVIthU1SKAF2anm8rJ8=";
    };
  
    nativeBuildInputs = [
      gettext
  