On Debian Linux one can do backups like this:

On backup:

dpkg --get-selections "*" >package_states

and then include package_states in your backup.  This saves a list
describing the installation status of each Debian package.

On restore:

After installing the base Debian system, setting up the network, etc, do
this:

apt-get update
dpkg --set-selections <package_states
apt-get upgrade dist-upgrade

This sets the list of installed packages to what you had before the crash.
apt-get will then automagically fetch and install these packages in the
right order, so you don't need to have backed up the actual packages
themselves.

Is there a way to get a similar backup/restore scheme happening in NetBSD?

Thankyou.

Andrew