if [ "$1" = "configure" ] && [ -z "$2" ] && [ -e "${DPKG_ROOT:-}/etc/nsswitch.conf" ] ; then
	if ! grep -E '^[^#:]+:.*\s(#SERVICE_NAMES#)\s' "${DPKG_ROOT:-}/etc/nsswitch.conf" >/dev/null ; then
		#OPERATIONS#
	fi
fi
