post_upgrade() {
    if [[ $(vercmp 1.18 "$2") -gt 0 ]]; then
        grep -ls '^.include ' /etc/systemd/system/netctl@*.service | \
          while read -r unit; do
            profile=$(systemd-escape --unescape "${unit:27:-8}")
            echo ":: The unit for profile '$profile' uses deprecated features."
            echo "   Consider running: netctl reenable $(printf '%q' "$profile")"
        done
    fi
}