anchor.diff:  , libxext
   , libxfixes
   , libxi
  +, libxkbfile
   , libxrandr
   , libxrender
   , libxscrnsaver
  +, libxtst
   , nspr
   , nss
   , pango
   , python
   , shared-mime-info
   , systemd_lib
  -, xorg
  -, xproto
  +, xorgproto
   , zlib
   
   , channel
  
positive.code:     gnome-themes-standard
      gtk_2
      gvfs
      kbproto
      libcap
      libgnome-keyring
      libgpg-error
  
negative.code:     libxext
      libxfixes
      libxi
      libxkbfile
      libxrandr
      libxrender
      libxscrnsaver
      libxtst
      nspr
      nss
      pango
      stdenv.cc.cc
      systemd_lib
      xorgproto
      zlib
    ];
  
  