anchor.diff:    buildInputs = [
       ncurses
       systemd_lib
  -    inputproto
  -    kbproto
       libx11
       libxext
       libxi
  
positive.code: , libxrandr
  , libxrender
  , ncurses
  , randrproto
  , systemd_lib
  , xorg
  , xorg-server
  , xproto
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:     libxrandr
      libxrender
      xorg.pixman
      xorg-server
      xorgproto
    ];
  
    preConfigure = ''
  