anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "blueprint-compiler";
  -  version = "unstable-2022-05-27";
  +  version = "0.2.0";
   
     src = fetchFromGitLab {
       domain = "gitlab.gnome.org";
       owner = "jwestman";
       repo = pname;
  -    rev = "cebd9ecadc53790cd547392899589dd5de0ac552";
  -    sha256 = "sha256-mNR0ooJSRBIXy2E4avXYEdO1aSST+j41TsVg8+kitwo=";
  +    rev = "v${version}";
  +    sha256 = "sha256-LXZ6n1oCbPa0taVbUZf52mGECrzXIcF8EaMVJ30rMtc=";
     };
   
     # Requires pythonfuzz, which I've found difficult to package
  
positive.code:     gobject-introspection
    ];
  
    postFixup = ''
      wrapPythonPrograms
    '';
  
    meta = with lib; {
      description = "A markup language for GTK user interface files";
      homepage = "https://gitlab.gnome.org/jwestman/blueprint-compiler";
  
negative.code:   nativeBuildInputs = [
      meson
      ninja
    ];
  
    buildInputs = [
  