anchor.diff:  { stdenv, intltool, fetchurl, wrapGAppsHook, gnome-video-effects, libcanberra_gtk3
   , pkgconfig, gtk3, glib, clutter_gtk, clutter-gst, udev, gst_all_1, itstool
   , libgudev, autoreconfHook, vala, docbook_xml_dtd_43, docbook_xsl, appstream-glib
  -, libxslt, yelp_tools, gnome_common
  +, libxslt, yelp_tools, gnome_common, gtk_doc
   , adwaita-icon-theme, librsvg, gdk_pixbuf, gnome3, gnome_desktop, libxml2 }:
   
   stdenv.mkDerivation rec {
  
positive.code:                   gst_all_1.gst-plugins-bad clutter_gtk clutter-gst
                    libcanberra_gtk3 libgudev ];
  
    outputs = [ "out" "man" ];
  
    patches = [
      gtk_doc.respect_xml_catalog_files_var_patch
  
negative.code:   nativeBuildInputs = [
      pkgconfig intltool itstool vala wrapGAppsHook libxml2 appstream-glib
      libxslt docbook_xml_dtd_43 docbook_xsl
      autoreconfHook gtk_doc yelp_tools gnome_common
    ];
    buildInputs = [ gtk3 glib gnome-video-effects
                    gdk_pixbuf adwaita-icon-theme librsvg udev gst_all_1.gstreamer
  