this post was submitted on 16 Jul 2026
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I love NixOS but I wouldn't commend it to people who are at a point in their sysadmin trajectory where they haven't heard of Ansible. (It's not just that Nix has a learning curve, it's that you're seriously screwed if you can't tell the difference between a Nix problem and a regular package / kernel issue.)
OP, use Ansible.
Yeah, I can see that. But I don't think that knowing Ansible will teach you that difference. OP seems to know enough about Linux to be comfortable so I would expect him to be able to distinguish between those.
I agree that Nix has a steep learning curve and it's not for everyone, but OP specifically asked for a way to declare their system, and Ansible doesn't work for something you'll setup now to use in 6 months when you decide to reinstall the system, because the best case scenario is you get your system as it was 6 months ago, but more realistically it doesn't work and you have to spend time fixing it or doing it manually.
Don't get me wrong, Ansible is great, I manage my home server with it, but if I go a while without running the pipeline when I do it rolls back several changes I made manually to test and forgot to consolidate. Nix is annoying because it forces you to declare everything every time, but you're guaranteed to get the same result you have now, which is very important for the case OP asked about.
Skip Ansible (IMO). Bit of a hole and slow, pain to write and debug (slow cycles).
Bite the bullet learn the hard right thing, nixos.
I have never in my life touched Ansible and daily drive NixOS on servers and desktop. +1 to skipping Ansible