Thanks Maxim, this is a great config.scm! :)

> Note that to have my root partition mounted on a subvolume, you'll need
> my (yet to be merged) patches available at:
> https://issues.guix.info/issue/37305.  I'll post a fresh, rebased v3
> (hopefully the last!) series shortly.

I see that you've posted a new series.
I've just sent patch 40236@debbugs.gnu.org to edit the template and use
Btrfs + Zstd.

Thanks!

-- 
Pierre Neidhardt
https://ambrevar.xyz/