anchor.diff:  { lib
   , stdenv
   , substituteAll
  -, fetchzip
  +, fetchurl
   , pkg-config
   , gettext
   , docbook-xsl-nons
  
positive.code:     gtkCleanImmodulesCache
    ];
  
    src = fetchzip {
      url = "https://gitlab.gnome.org/GNOME/gtk/-/archive/9d1d2f0a6643570274121fc1473e46a6edc2e32d/gtk-9d1d2f0a6643570274121fc1473e46a6edc2e32d.tar.gz";
      sha256 = "sha256-+K1Kp3Sklrj/Ly0pSktfQwfcrIKpbf05NQbMDhWJZNI=";
    };
  
    patches = [
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gtk+3";
    version = "3.24.34";
  
    outputs = [ "out" "dev" ] ++ lib.optional withGtkDoc "devdoc";
    outputBin = "dev";
  