@wiak Remember the Fossapup64 that I outfitted with apt_sfs_load_fossa_amd64.sfs? Just updated the entire system including Zoneminder successfully. Then ran the script that removes the systemd and restores the Puppy Linux mechanism for poweroff and reboot.
This system was set up in Feb. 2021 and is now still running very well with the most recent system upgrade using APT package manager. It had been a long time since I booted into it but everything is running and updated the browsers. nice.