anchor.diff:  
     doCheck = true;
   
  -  propagatedUserEnvPkgs = [ gnome3.gnome_themes_standard ];
  +  propagatedUserEnvPkgs = [ gnome3.gnome_themes_standard
  +                            gnome3.evolution_data_server ];
   
     propagatedBuildInputs = [ gnome3.gtkhtml ];
   
  -  buildInputs = [ pkgconfig gtk3 glib intltool itstool libxml2 libtool
  +  buildInputs = [ gtk3 glib intltool itstool libxml2 libtool
                     gdk_pixbuf gnome3.defaultIconTheme librsvg db icu
                     gnome3.evolution_data_server libsecret libical gcr
                     webkitgtk shared_mime_info gnome3.gnome_desktop gtkspell3
                     libcanberra_gtk3 bogofilter gnome3.libgdata sqlite
                     gst_all_1.gstreamer gst_all_1.gst-plugins-base p11_kit
                     nss nspr libnotify procps highlight gnome3.libgweather
  -                  gnome3.gsettings_desktop_schemas makeWrapper ];
  +                  gnome3.gsettings_desktop_schemas dconf
  +                  gnome3.libgnome_keyring gnome3.glib_networking ];
  +
  +  nativeBuildInputs = [ pkgconfig wrapGAppsHook ];
   
     configureFlags = [ "--disable-spamassassin" "--disable-pst-import" "--disable-autoar"
                        "--disable-libcryptui" ];
  
positive.code: { stdenv, intltool, fetchurl, libxml2, webkitgtk, highlight
  , pkgconfig, gtk3, glib, libnotify, gtkspell3
  , makeWrapper, itstool, shared_mime_info, libical, db, gcr, sqlite
  , gnome3, librsvg, gdk_pixbuf, libsecret, nss, nspr, icu, libtool
  , libcanberra_gtk3, bogofilter, gst_all_1, procps, p11_kit }:
  
  let
    majVer = gnome3.version;
  
negative.code:   NIX_CFLAGS_COMPILE = "-I${nspr.dev}/include/nspr -I${nss.dev}/include/nss -I${glib.dev}/include/gio-unix-2.0";
  
    enableParallelBuilding = true;
  
    meta = with stdenv.lib; {
      homepage = https://wiki.gnome.org/Apps/Evolution;
  