anchor.diff:      ninja
       pkg-config
       gi-docgen
  -    python3
       gobject-introspection
  -    wrapGAppsHook
  +    wrapGAppsHook4
     ];
   
     buildInputs = [
  
positive.code: { stdenv
  , lib
  , fetchurl
  , fetchpatch
  , pkg-config
  , gi-docgen
  , meson
  , ninja
  , python3
  , gnome
  , desktop-file-utils
  , appstream-glib
  
negative.code:   mesonFlags = [
      "-Dgtk_doc=true"
    ];
  
    postFixup = ''
      # Cannot be in postInstall, otherwise _multioutDocs hook in preFixup will move right back.
  