anchor.diff:  { stdenv
   , fetchurl
  -, xorg
  +, lib
  +
  +, libx11
  +, libxext
  +, libxrandr
  +, libxrender
  +, xorgproto
   }:
   
   stdenv.mkDerivation rec {
  
positive.code:     installFlagsArray+=("PREFIX=$out")
    '';
  
    meta = with stdenv.lib; {
      homepage = http://tools.suckless.org/slock;
      description = "Simple X display locker";
      license = licenses.mit;
  
negative.code:   };
  
    buildInputs = [
      libx11
      libxext
      libxrandr
      libxrender
      xorgproto
    ];
  
    # Don't setuid as nixbuild doesn't allow this
  