set -e
	if true; then
		sed -e '/^hosts:/s/\s*\<myhostname\>//' \
			-e '/^hosts:/s/\s*myhostname//' \
			-i $D/etc/nsswitch.conf
	fi
	if true; then
		sed -e '/^passwd:/s#\s*systemd##' \
			-e '/^group:/s#\s*systemd##' \
			-e '/^shadow:/s#\s*systemd##' \
			-i $D/etc/nsswitch.conf
	fi
	update-alternatives --remove  halt /usr/bin/systemctl
	update-alternatives --remove  reboot /usr/bin/systemctl
	update-alternatives --remove  shutdown /usr/bin/systemctl
	update-alternatives --remove  poweroff /usr/bin/systemctl
	update-alternatives --remove  runlevel /usr/bin/systemctl
	update-alternatives --remove  resolv-conf /etc/resolv-conf.systemd
