I have a need to experiment with systemd config, where I have some locally stored (somewhere inside $HOME) *.service files. But I do not want to create some kind of VM or container only for that purpose of experimenting/testing.
Is it possible somehow to point systemctl to that custom directory, eliminating the need to copy that test service config file into one of the default directories (/etc/systemd, /usr/lib/systemd etc.)?