When the container storage is checked it may come from a btrfs
subvolume. In /proc/self/mountinfo this looks like:
```
1364 1345 0:33 /root/var/lib/containers/storage /var/lib/containers/storage rw,relatime - btrfs /dev/mapper/luks-1356123c-c7b9-1bd7-a8bf-e13d4cbb5500 rw,seclabel,compress=zstd:1,ssd,discard=async,space_cache,subvolid=257,subvol=/root
```
as a quick fix just compare the suffix of the root instead of the
full path.
Thanks for Ondrej!
2f0d81288a