Same, I originally had a bunch of RasPi's in my lab running differing versions of Raspbian until I got tired of the configuration drift and finally Nixified all of them. Writing a single Nix Flake and being able to build declarative SD card installation images for all of them makes managing a bunch of different machines an absolute dream (tutorial here[0], for those interested).
The only issue is remotely deploying Nix configs. The only first-party tool, nixops, is all but abandoned and unsupported. The community driven tools like morph and deploy-rs seem promising, but they vary in terms of Flakes support and how much activity/longevity they seem to have.
The only issue is remotely deploying Nix configs. The only first-party tool, nixops, is all but abandoned and unsupported. The community driven tools like morph and deploy-rs seem promising, but they vary in terms of Flakes support and how much activity/longevity they seem to have.
[0] https://blog.janissary.xyz/posts/nixos-install-custom-image