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: { stdenv, intltool, fetchurl, exempi, libxml2
  , pkgconfig, gtk3, glib, hicolor_icon_theme
  , makeWrapper, itstool, gegl, babl, lcms2
  , desktop_file_utils, gmp, libmediaart
  , gnome3, librsvg, gdk_pixbuf, libexif }:
  
  stdenv.mkDerivation rec {
  
negative.code:                   gnome3.gfbgraph gnome3.grilo-plugins gnome3.grilo
                    gnome3.gnome_online_accounts gnome3.gnome_desktop
                    lcms2 libexif gnome3.tracker libxml2 desktop_file_utils
                    wrapGAppsHook ];
  
    enableParallelBuilding = true;
  
  