```
ash base-update
```
Note: the base itself is located at ```/.snapshots/rootfs/snapshot-0``` with it's specific ```/var``` files and ```/etc``` being located at ```/.snapshots/var/var-0``` and ```/.snapshots/etc/etc-0``` respectively, therefore if you really need to make a configuration change, you can mount snapshot these as read-write and then snapshot back as read only
Flatpak can be used for persistent package installation