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Comment by wingworks | Hacker News Reader

"when you reboot, it'll be into the new OS." Oh man, wouldn't that be amazing!

NixOS then lives in the future, as that is exactly what it does!

Pff, FreeBSD and Illumos/Solaris have BE's (boot environments) since years

Can you give your system’s declarative configuration to another machine and boot into an equivalent one? :D

Yes.

With FreeBSD I can 'send' entire BE to other system and boot it there - which I often do.

Just use:

    # zfs send <ZFS-BE-DATASET@snap> | ssh <IP> zfs recv <ZFS-BE-DATASET>

I also sometimes installed FreeBSD/GhostBSD system in a VM and then 'send' it to physical hardware.

Hope that helps.