Hello,
there is a ‘kink’ you have to realize, when using NomadBSD and decide to upgrade and keep your installation alive - you are probably crossing the border of what was originally “intended use” of this distribution!
Personally I’m OK with that 
Try run mount in the terminal(Sakura) and you will see a read-only unionfs entry.
/dev/md0.uzip on /unionfs/usr/local (ufs, local, read-only)
So NomadBSD is created with a compact core/blob in the filesystem, that will not change when updating the system. The updates/changes is written on-top of the blob (I’m OK with paying this ‘space-penalty’ on my desktop-system for using NomadBSD).
That is also why removing a program/package from a brand new NomadBSD-system will not release any disk-space (it is NOT removed from the underlying read-only unionfs).
AND that’s why a NomadBSD-updater is NOT as trivial or straight forward as updating a plain vanilla FreeBSD system.
PLEASE chime in with the details I’m getting wrong!
BSD-regards
Tom Ludensen