systemd-cron.install

_post_install_or_upgrade() {
    touch /run/crond.reboot
    touch /run/crond.bootdir
  chown root:crontab /usr/lib/systemd-cron/crontab_setgid
  chown root:crontab /var/spool/cron
  chmod 2755 /usr/lib/systemd-cron/crontab_setgid
}

pre_install() {
  getent group crontab >/dev/null 2>&1 || groupadd --system crontab  >/dev/null
}

post_install() {
    _post_install_or_upgrade
}

post_upgrade() {
    _post_install_or_upgrade
}

post_remove() {
  getent group crontab >/dev/null 2>&1 || groupdel crontab >/dev/null
}