anchor.diff:      pkg-config
       python3
       sassc
  +    gdk-pixbuf
     ] ++ setupHooks ++ lib.optionals withGtkDoc [
       docbook_xml_dtd_43
       docbook-xsl-nons
       gtk-doc
       # For xmllint
       libxml2
  +  ] ++ lib.optionals waylandSupport [
  +    wayland-scanner
     ];
   
     buildInputs = [
  
positive.code: , gnome
  , gsettings-desktop-schemas
  , sassc
  , trackerSupport ? stdenv.isLinux
  , tracker
  , x11Support ? stdenv.isLinux
  , waylandSupport ? stdenv.isLinux
  
negative.code:     ./patches/3.0-darwin-x11.patch
    ];
  
    depsBuildBuild = [
      pkg-config
    ];
    nativeBuildInputs = [
      gettext
      gobject-introspection
  