anchor.diff:  
     meta = with stdenv.lib; {
       description = "Dynamic Host Configuration Protocol (DHCP) tools";
  -
  -    longDescription = ''
  -      ISC's Dynamic Host Configuration Protocol (DHCP) distribution
  -      provides a freely redistributable reference implementation of
  -      all aspects of DHCP, through a suite of DHCP tools: server,
  -      client, and relay agent.
  -   '';
  -
       homepage = http://www.isc.org/products/DHCP/;
       license = licenses.isc;
       platforms = platforms.all;
  
positive.code:     substituteInPlace $out/sbin/dhclient-script \
        --replace /sbin/ip ${iproute}/sbin/ip
      wrapProgram "$out/sbin/dhclient-script" --prefix PATH : \
        "${nettools}/bin:${nettools}/sbin:${iputils}/bin:${coreutils}/bin:${gnused}/bin"
    '';
  
    # Fails to build the bind library if run in parallel
  
negative.code: { stdenv, fetchurl, perl, makeWrapper, autoreconfHook
  , net-tools, iputils, iproute, coreutils, gnused
  
  # Optional Dependencies
  , openldap ? null
  