anchor.diff:    buildInputs = [ pkgconfig openssl zlib freetype fontconfig fribidi SDL2 SDL mesa
       giflib libpng libtiff glib gst_all_1.gstreamer gst_all_1.gst-plugins-base
       gst_all_1.gst-libav libpulseaudio libsndfile xorg.libXcursor xorg.printproto
  -    xorg.libX11 udev utillinuxCurses ];
  +    xorg.libX11 udev utillinuxCurses systemd ];
   
     propagatedBuildInputs = [ libxkbcommon python27Packages.dbus dbus libjpeg xorg.libXcomposite
       xorg.libXdamage xorg.libXinerama xorg.libXp xorg.libXtst xorg.libXi xorg.libXext
  
positive.code:     "--disable-tslib" "--with-systemdunitdir=$out/systemd/user"
      "ac_ct_CXX=foo" ];
  
    NIX_CFLAGS_COMPILE = [ "-I${xorg.libXtst}" "-I${dbus_libs.dev}/include/dbus-1.0" "-I${dbus_libs.lib}/lib/dbus-1.0/include" ];
  
    patches = [ ./efl-elua.patch ];
  
    preConfigure = ''
      export PKG_CONFIG_PATH="${gst_all_1.gst-plugins-base}/lib/pkgconfig/gstreamer-video-0.10.pc:$PKG_CONFIG_PATH"
      export LD_LIBRARY_PATH="$(pwd)/src/lib/eina/.libs:$LD_LIBRARY_PATH"
    '';
  
  
negative.code: { stdenv, fetchurl, pkgconfig, openssl, libjpeg, zlib, freetype, fontconfig, fribidi, SDL2, SDL, mesa, giflib, libpng, libtiff, glib, gst_all_1, libpulseaudio, libsndfile, xorg, libdrm, libxkbcommon, udev, utillinuxCurses, dbus, bullet, luajit, python27Packages, openjpeg, doxygen, expat, harfbuzz, jbig2dec, librsvg, dbus_libs, alsaLib, poppler, libraw, libspectre, xineLib, vlc, libwebp, curl, libinput, systemd }:
  
  
  stdenv.mkDerivation rec {
  