anchor.diff:    ];
   
     mesonFlags = [
  -    "-Dgtk_doc=${lib.boolToString (stdenv.buildPlatform == stdenv.hostPlatform)}"
  -    "-Dintrospection=${if (stdenv.buildPlatform == stdenv.hostPlatform) then "enabled" else "disabled"}"
  +    "-Dgtk_doc=true"
  +    "-Dintrospection=enabled"
       "-Dinstalled_test_datadir=${placeholder "installedTests"}/share"
       "-Dinstalled_test_bindir=${placeholder "installedTests"}/libexec"
     ];
  
positive.code: 
    postPatch = ''
      patchShebangs tests/gen-installed-test.py
    '' + lib.optionalString (stdenv.buildPlatform == stdenv.hostPlatform) ''
      PATH=${python3.withPackages (pp: [ pp.pygobject3 pp.tappy ])}/bin:$PATH patchShebangs tests/introspection.py
    '';
  
  
negative.code:   pname = "graphene";
    version = "1.10.8";
  
    outputs = [ "out" "dev" "devdoc" ]
      ++ lib.optionals (stdenv.hostPlatform == stdenv.buildPlatform) [ "installedTests" ];
  
    src = fetchFromGitHub {
      owner = "ebassi";
  