if [ "$1" = "purge" ] && [ -e "${DPKG_ROOT:-}/etc/nsswitch.conf" ] && [ "$DPKG_MAINTSCRIPT_PACKAGE_REFCOUNT" = 1 ] ; then
	sed -E -i "${DPKG_ROOT:-}/etc/nsswitch.conf" \
		-e ':a /^#DB#:\s/ s/\s(#SERVICE_NAMES#)\s+\[!?[A-Z]+=[a-z]+\](\s|$)/\2/g ; t a' \
		-e ':a /^#DB#:\s/ s/\s(#SERVICE_NAMES#)(\s|$)/\2/g ; t a'
fi
