anchor.diff:  
     # doCheck = true;
   
  -  propagatedUserEnvPkgs = [ gnome3.gnome_themes_standard ];
  -
     NIX_CFLAGS_COMPILE = "-I${gnome3.glib}/include/gio-unix-2.0";
   
     buildInputs = [ pkgconfig gtk3 glib intltool itstool gegl babl gnome3.libgdata
  
positive.code:                   gnome3.gfbgraph gnome3.grilo-plugins gnome3.grilo
                    gnome3.gnome_online_accounts gnome3.gnome_desktop
                    lcms2 libexif gnome3.tracker libxml2 desktop_file_utils
                    hicolor_icon_theme gnome3.adwaita-icon-theme ];
  
    preFixup = ''
      for f in $out/bin/* $out/libexec/*; do
        wrapProgram "$f" \
          --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE" \
          --prefix GRL_PLUGIN_PATH : "${gnome3.grilo-plugins}/lib/grilo-0.2" \
          --prefix XDG_DATA_DIRS : "${gnome3.gnome_themes_standard}/share:$out/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH"
      done
    '';
  
    enableParallelBuilding = true;
  
  
negative.code: { stdenv, intltool, fetchurl, exempi, libxml2
  , pkgconfig, gtk3, glib, hicolor_icon_theme
  , makeWrapper, itstool, gegl, babl, lcms2
  , desktop_file_utils, gmp, libmediaart, wrapGAppsHook
  , gnome3, librsvg, gdk_pixbuf, libexif }:
  
  stdenv.mkDerivation rec {
  