anchor.diff:      xorg.xcbutilimage
       xorg.xcbutilkeysyms
       xorg.xcbutilrenderutil
  -    xorg.xkbcomp
  +    xkbcomp
       xorgproto
       xtrans
     ];
  
positive.code: #, xcbutilimage
  #, xcbutilkeysyms
  #, xcbutilrenderutil
  , xorg
  , xorgproto
  , xtrans
  
negative.code:     ###ln -s /var/tmp $out/share/X11/xkb/compiled  # FIXME
  
      wrapProgram $out/bin/Xephyr \
        --set XKB_BINDIR "${xkbcomp}/bin" \
        --add-flags "-xkbdir ${xkeyboard-config}/share/X11/xkb"
      wrapProgram $out/bin/Xvfb \
        --set XKB_BINDIR "${xkbcomp}/bin" \
        --set XORG_DRI_DRIVER_PATH ${opengl-dummy.driverSearchPath}/lib/dri \
        --add-flags "-xkbdir ${xkeyboard-config}/share/X11/xkb"
    '';
  
    bindnow = false;
  