anchor.diff:    NIX_CFLAGS_COMPILE = "-I${nspr.dev}/include/nspr -I${nss.dev}/include/nss -I${glib.dev}/include/gio-unix-2.0";
   
     enableParallelBuilding = true;
  -
  -  preFixup = ''
  -    for f in $out/bin/* $out/libexec/*; do
  -      wrapProgram "$f" \
  -        --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE" \
  -        --prefix XDG_DATA_DIRS : "${gnome3.gnome_themes_standard}/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH"
  -    done
  -  '';
   
     meta = with stdenv.lib; {
       homepage = https://wiki.gnome.org/Apps/Evolution;
  
positive.code: 
    doCheck = true;
  
    propagatedUserEnvPkgs = [ gnome3.gnome_themes_standard ];
  
    propagatedBuildInputs = [ gnome3.gtkhtml ];
  
    buildInputs = [ pkgconfig 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 ];
  
    configureFlags = [ "--disable-spamassassin" "--disable-pst-import" "--disable-autoar"
                       "--disable-libcryptui" ];
  
negative.code: { stdenv, intltool, fetchurl, libxml2, webkitgtk, highlight
  , pkgconfig, gtk3, glib, libnotify, gtkspell3
  , wrapGAppsHook, 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, dconf }:
  
  let
    majVer = gnome3.version;
  