anchor.diff:    nativeBuildInputs = [
       meson
       ninja
  -    python3.pkgs.wrapPython
     ];
   
     buildInputs = [
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "blueprint-compiler";
    version = "unstable-2022-05-27";
  
    src = fetchFromGitLab {
      domain = "gitlab.gnome.org";
      owner = "jwestman";
      repo = pname;
      rev = "cebd9ecadc53790cd547392899589dd5de0ac552";
      sha256 = "sha256-mNR0ooJSRBIXy2E4avXYEdO1aSST+j41TsVg8+kitwo=";
    };
  
    # Requires pythonfuzz, which I've found difficult to package
  
negative.code:     gobject-introspection
    ];
  
    meta = with lib; {
      description = "A markup language for GTK user interface files";
      homepage = "https://gitlab.gnome.org/jwestman/blueprint-compiler";
  