Start nspawn containers with read/write permissions
Start nspawn containers with read/write permissions

Don't set the --read-only flag for nspawn containers if just the root partition is read-only.
Don't set the --volatile=overlay flag for images created with usr-only or a generated root.
If the --volatile=overlay flag is set the container won't find the shell or init program.

systemd/mkosi,systemd/mkosi