First, I used 22.214.171.124 because it works, where a later version (126.96.36.199, I think) doesn't.
Have to create the user via the panel. Useradd isn't included.
Oh look, it doesn't run.
Oh look, I can't mount on /dev/shm.
Hah! It works, and persists when I reboot. Yay me!