anchor.diff:    nativeBuildInputs = [ makeWrapper pkgconfig ];
     buildInputs = [
       libxml2 gnutls perl python2 readline gettext libtasn1 libgcrypt yajl
  -    libxslt xhtml1 perlPackages.XMLXPath curl libpcap jansson
  +    libxslt xhtml1 perlPackages.XMLXPath curl libpcap
     ] ++ optionals (!buildFromTarball) [
       libtool autoconf automake
     ] ++ optionals stdenv.isLinux [
  -    libpciaccess lvm2 utillinux systemd libnl numad zfs
  +    libpciaccess lvm2 lvm2 utillinux systemd libnl numad zfs
       libapparmor libcap_ng numactl attr parted
     ] ++ optionals (enableXen && stdenv.isLinux && stdenv.isx86_64) [
       xen
  
positive.code:     "--localstatedir=/var"
      "--sysconfdir=/var/lib"
      "--with-libpcap"
      "--with-qemu"
      "--with-vmware"
      "--with-vbox"
      "--with-test"
  
negative.code: , iproute, iptables, readline, lvm2, utillinux, systemd, libpciaccess, gettext
  , libtasn1, ebtables, libgcrypt, yajl, pmutils, libcap_ng, libapparmor
  , dnsmasq, libnl, libpcap, libxslt, xhtml1, numad, numactl, perlPackages
  , curl, libiconv, gmp, zfs, parted, bridge-utils, dmidecode
  , enableXen ? false, xen ? null
  , enableIscsi ? false, openiscsi
  }:
  