anchor.diff: -{ lib, stdenv, fetchurl, pkgconfig, gtk2, gtk3, pango, perl, python, zip, libIDL
  +{ lib, stdenv, fetchurl, pkgconfig, gtk2, pango, perl, python, zip, libIDL
   , libjpeg, zlib, dbus, dbus_glib, bzip2, xorg
   , freetype, fontconfig, file, alsaLib, nspr, nss, libnotify
   , yasm, mesa, sqlite, unzip, makeWrapper
  
positive.code:       patchelf --set-rpath "${lib.getLib libnotify
          }/lib:$(patchelf --print-rpath "$out"/lib/firefox-*/libxul.so)" \
            "$out"/lib/firefox-*/libxul.so
      '';
  
    meta = {
  
negative.code:     ++ lib.optional enableGTK3 gtk3
      ++ lib.optionals (!passthru.ffmpegSupport) [ gstreamer gst-plugins-base ];
  
    nativeBuildInputs = [ autoconf213 which gnused pkgconfig perl python ] ++ lib.optional enableGTK3 wrapGAppsHook;
  
    configureFlags =
      [ "--enable-application=browser"
  