anchor.diff:  
     src = fetchurl {
       url = "http://www.atoptool.nl/download/netatop-${version}.tar.gz";
  -    sha256 = "03n248p1l3ps7gj2hdlcbrb1fsw1zcmgzypj4j4l4rynjjh7qvf6";
  +    sha256 = "0qjw8glfdmngfvbn1w63q128vxdz2jlabw13y140ga9i5ibl6vvk";
     };
   
     buildInputs = [ zlib ];
  
positive.code: { stdenv, fetchurl, kernel, zlib }:
  
  let
    version = "2.0";
  in
  
  stdenv.mkDerivation {
  
negative.code:         -e s,/usr,$out, \
          -e /init.d/d \
          -e /depmod/d \
          -e /netatop.service/d \
          Makefile
    '';
  
  