Hello, thank you all developers for your efforts first. I just wonder whether I can use container's services as dependencies in Host's system service unit or not.. The container has been built by systemd-nspawn and it runs systemd as init program. --- Host's service file --- [Unit] Description=Leesoo's mydaemon Requires=leesoo@slices.target <-- Maybe like this..? it doesn't work by the way. After=leesoo@slices.target <-- same as above [Service] ExecStart=/usr/bin/system-run -M leesoo /root/mydaemon Type=forking Restart=on-failure RestartSec=5s RemainAfterExit=yes [Install] WantedBy=multi-user.target -------- Best regards, Leesoo