anchor.diff:  #, xcbutilimage
   #, xcbutilkeysyms
   #, xcbutilrenderutil
  +, xkbcomp
  +, xkeyboard-config
   , xorg
   , xorgproto
   , xtrans
  
positive.code: #, libxpm
  , libxrender
  , libxres
  #, libxshmfence
  , libxt
  , libxtst
  , nettle
  
negative.code:     xorg.xcbutilimage
      xorg.xcbutilkeysyms
      xorg.xcbutilrenderutil
      xkbcomp
      xorgproto
      xtrans
    ];
  