anchor.diff:  , libxrandr
   , libxrender
   , libxscrnsaver
  -#, libxshmfence
  +, libxshmfence
   , libxtst
   , libxv
   #, libxvmc
   #, pixman
  -, presentproto
  -, randrproto
  -, renderproto
   , systemd_lib
   #, xcb-util
  -, xextproto
  -, xf86driproto
   , xorg
   , xorg-server
  -, xproto
  +, xorgproto
   }:
   
   let
  
positive.code: , util-macros
  
  , cairo
  , damageproto
  , dri2proto
  , dri3proto
  , fixesproto
  , fontsproto
  #, intel-gpu-tools
  , libdrm
  , libpciaccess
  
negative.code: 
    buildInputs = [
      cairo
      #intel-gpu-tools
      xorg.intelgputools
      libdrm
  