anchor.diff:      sed -i 's/ON_SHUTDOWN=suspend/ON_SHUTDOWN=''${ON_SHUTDOWN:-suspend}/' $out/libexec/libvirt-guests.sh
       substituteInPlace $out/libexec/libvirt-guests.sh \
         --replace "$out/bin" "${gettext}/bin"
  +  '' + stdenv.lib.optionalString stdenv.isLinux ''
       wrapProgram $out/sbin/libvirtd \
         --prefix PATH : ${iptables}/sbin:${iproute}/sbin:${pmutils}/bin:${numad}/bin:${numactl}/bin
     '';
  
positive.code: , iproute, iptables, readline, lvm2, utillinux, udev, libpciaccess, gettext
  , libtasn1, ebtables, libgcrypt, yajl, makeWrapper, pmutils, libcap_ng
  , dnsmasq, libnl, libpcap, libxslt, xhtml1, numad, numactl, perlPackages
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:       versions of Linux (and other OSes)
      '';
      license = licenses.lgpl2Plus;
      platforms = platforms.unix;
    };
  }
  