Comment # 7 on bug 1224066 from Alexandre Vicenzi

> In case of DistroBox it is not clear at the very first usage that it's all bound to Docker (- services/groups). 

Distrobox already states in its documentation that it requires rootless
podman/docker to work properly and also links to proper instructions.

See: https://distrobox.it/compatibility/#supported-container-managers

> Probably an echo/printf message could be enough, but it should be told after install or initial startup somehow - more likely a request to upstream.

For now, I'm going to close this as there's nothing we can do on our side.

Issues raised upstream with permission denied are often closed as invalid and
pointed to the documentation. If there's a reliable way to detect that the
system is not in rootless mode, it might be worth implementing it upstream and
printing it out to warn the user.