anchor.diff:      gobject-introspection
       python3
       makeWrapper
  +  ] ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
  +    mesonEmulatorHook
     ];
   
     buildInputs = [
  
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:   ];
  
    mesonFlags = [
      "-Dgtk_doc=true"
      "-Dintrospection=enabled"
      "-Dinstalled_test_datadir=${placeholder "installedTests"}/share"
      "-Dinstalled_test_bindir=${placeholder "installedTests"}/libexec"
    ];
  