https://news.ycombinator.com/item?id=8325308
> The GNU Shepherd is a service manager written in Guile that looks after the herd of daemons running on the system. It can be used as an “init” system (PID 1) and also by unprivileged users...
Not systemd, but it is an init system.
https://news.ycombinator.com/item?id=8325308