anchor.diff:      libtiff
       libxml2
       ncurses
  -    xorg.xproto
  +    xorg.kbproto
  +    xorg.libICE
       xorg.libSM
       xorg.libX11
       xorg.libXft
  
positive.code:     alsa-lib
      dbus
      fontconfig
      gconf
      giflib
      glib
  
negative.code:     xorg.libXpm
      xorg.libXrandr
      xorg.libXrender
      xorg.xproto
    ];
  
    configureFlags = [
  