anchor.diff:  { 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
  +, dnsmasq, libnl, libpcap, libxslt, xhtml1, numad, numactl
   , pythonPackages, perlPackages
   }:
   
  
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:     "--with-macvtap"
      "--with-virtualport"
      "--with-libpcap"
      "--with-numad"
    ];
  
    installFlags = [
  