anchor.diff:      substituteInPlace $out/libexec/libvirt-guests.sh \
         --replace "$out/bin" "${gettext}/bin"
       wrapProgram $out/sbin/libvirtd \
  -      --prefix PATH : ${iptables}/sbin:${iproute}/sbin:${pmutils}/bin
  +      --prefix PATH : ${iptables}/sbin:${iproute}/sbin:${pmutils}/bin:${numad}/bin:${numactl}/bin
     '';
   
     enableParallelBuilding = true;
  
positive.code:     "--with-macvtap"
      "--with-virtualport"
      "--with-libpcap"
    ];
  
    installFlags = [
  
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
  }:
  
  