anchor.diff:  , 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
  +, curl, libiconv, gmp, zfs, parted, bridge-utils, dmidecode, dbus
   , enableXen ? false, xen ? null
   , enableIscsi ? false, openiscsi
   , enableCeph ? false, ceph
  
positive.code:     "--with-test"
      "--with-esx"
      "--with-remote"
    ] ++ optionals stdenv.isLinux [
      "QEMU_BRIDGE_HELPER=/run/wrappers/bin/qemu-bridge-helper"
      "QEMU_PR_HELPER=/run/libvirt/nix-helpers/qemu-pr-helper"
  
negative.code:   nativeBuildInputs = [ makeWrapper pkgconfig docutils ] ++ optionals (!buildFromTarball) [ autoreconfHook ];
    buildInputs = [
      libxml2 gnutls perl python2 readline gettext libtasn1 libgcrypt yajl
      libxslt xhtml1 perlPackages.XMLXPath curl libpcap glib dbus
    ] ++ optionals stdenv.isLinux [
      libpciaccess lvm2 utillinux systemd libnl numad zfs
      libapparmor libcap_ng numactl attr parted
  