anchor.diff:    meta = with lib; {
       description = "Image pixel format conversion library";
       homepage = "https://gegl.org/babl/";
  +    changelog = "https://gitlab.gnome.org/GNOME/babl/-/blob/BABL_${lib.replaceStrings [ "." ] [ "_" ] version}/NEWS";
       license = licenses.lgpl3Plus;
       maintainers = with maintainers; [ jtojnar ];
       platforms = platforms.unix;
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "babl";
    version = "0.1.88";
  
    outputs = [ "out" "dev" ];
  
    src = fetchurl {
      url = "https://download.gimp.org/pub/babl/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "sha256-Tw1/SqoLsucl80mt97NRqVfZ+ybVVdmJWnr4FrQWcDk=";
    };
  
    nativeBuildInputs = [
  
negative.code: { stdenv
  , lib
  , fetchurl
  , fetchpatch
  , meson
  , ninja
  , pkg-config
  