anchor.diff:  { coreutils
  -, ebtables
   , fetchurl
   , gnugrep
   , gnused
   , iproute2
  -, ipset
   , iptables
   , perl
   , perlPackages
  
positive.code:   buildInputs = [
      coreutils
      iproute2
      ipset
      iptables
      ebtables
      util-linux
      gnugrep
      gnused
  
negative.code:            [ "${coreutils}/bin"
               "${iproute2}/bin"
               "${iptables}/bin"
               "${util-linux}/bin"
               "${gnugrep}/bin"
               "${gnused}/bin"
  