anchor.diff:  
     src = fetchurl {
       url = "mirror://gnome/sources/gtk+/${stdenv.lib.versions.majorMinor version}/gtk+-${version}.tar.xz";
  -    sha256 = "120yz5gxqbv7sgdbcy4i0b6ixm8jpjzialdrqs0gv15q7bwnjk8w";
  +    sha256 = "1h5snvqz8f6zgwpmq7pblvfwj5dphfckj8bv7vdz1c0w49dja47j";
     };
   
     patches = [
  
positive.code:       url = "https://bug757142.bugzilla-attachments.gnome.org/attachment.cgi?id=344123";
        sha256 = "0g6fhqcv8spfy3mfmxpyji93k8d4p4q4fz1v9a1c1cgcwkz41d7p";
      })
      # https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/1528
      (fetchpatch {
        url = "https://gitlab.gnome.org/GNOME/gtk/-/commit/3c28751dee115e969a58a733f2f19e71062b9d2d.patch";
        sha256 = "1rqrmymwd22dsiy7agjw13mcyic3by6020rxyaw7zslnmyzfiwc3";
      })
      # https://gitlab.gnome.org/GNOME/gtk/merge_requests/1002
      ./patches/01-build-Fix-path-handling-in-pkgconfig.patch
    ] ++ optionals stdenv.isDarwin [
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gtk+3";
    version = "3.24.17";
  
    outputs = [ "out" "dev" ] ++ optional withGtkDoc "devdoc";
    outputBin = "dev";
  