How to use storage.options when using --root to use a different location?

[gabyx]

When I am setting --root the storage.options in /etc/containers/storage.conf get ignored by design.
Is there a possibility to use the same storage.conf file even when setting --root. For example I loose the storage.options.additionalimagestores setting which is important.

This arises when nesting podman-in-podman and wanting some separation of the root directories by specifying --root.

#22049 (comment)