anchor.diff:      "--with-macvtap"
       "--with-virtualport"
       "--with-libpcap"
  +    "--with-numad"
     ];
   
     installFlags = [
  
positive.code:     substituteInPlace $out/libexec/libvirt-guests.sh \
        --replace "$out/bin" "${gettext}/bin"
      wrapProgram $out/sbin/libvirtd \
        --prefix PATH : ${iptables}/sbin:${iproute}/sbin:${pmutils}/bin
    '';
  
    enableParallelBuilding = true;
  
negative.code: { stdenv, fetchurl, pkgconfig, libxml2, gnutls, devicemapper, perl, python
  , iproute, iptables, readline, lvm2, utillinux, udev, libpciaccess, gettext
  , libtasn1, ebtables, libgcrypt, yajl, makeWrapper, pmutils, libcap_ng
  , dnsmasq, libnl, libpcap, libxslt, xhtml1, numad, numactl
  , pythonPackages, perlPackages
  }:
  
  