For anyone that is interested in Guix System ZFS support, here's implementation. Right now it's usable but isn't ready for merging into Guix.

Let me know if there's bug in the implementation if you manage to have a try. It's much welcomed if you can also help with TODOs listed in the PR.

I have deployed it on my systems and I'll update my dotfiles for this PR soon(currently a different implementation is used by the published configurations), so there're example configurations you can view.

#guix