[Dedime]

My problem with NixOS is the second you try to go "outside the guardrails", the difficulty increases 100x

[ivanjermakov]

Kind of the same for docker? Plopping a docker compose file and setting up few environment vars vs writing dockerfiles from scratch.

[cromka]

Not really. No. You can easily checkout repo containing the Dockerfile, add a Dockerfile override, change most of the stuff while maintaining the original Dockerfile instact and the ability to use git to update it. Then you change one line in docker-compose.yaml (or override it if it's also hosted by the repo) and build the container locally. Can't imagine easier way to modify existing docker images, I do this a lot with my self-hosted services.

[conradev]

I have found Nix and NixOS to be able to absorb any amount of complexity I throw at it with grace.

If a Docker image truly is the best way to use a bit of functionality (like Home Assistant), then I will just configure NixOS to run it in podman as a systemd service with host networking.

I have not come across something that I could not package. The trick is that Nix composes functionality in a way that Dockerfiles or docker-compose configs cannot, because it's one language, one system, one abstraction.

[lilyball]

Is it? Why? If a NixOS module doesn’t support what you need, you can just write your own module, and the module system lets you disable existing modules if you need to. Doing anything custom this way still feels easier than doing it in an imperative world.

[maccard]

> you can just write your own module, and the module system lets you disable existing modules if you need to

That sounds about 100x more difficult to me

[jbstack]

"Just" write your own module?

Have you seen how bad the Nix documentation is and how challenging Nix (the language) is? Not to mention that you have to learn Yet Another Language just for this corner case, which you will not use for anything else. At least Guix uses a lisp variant so that some of the skills you gain are transferable (e.g. to Emacs, or even to a GP language like Common Lisp or Racket).

Don't get me wrong, I love the concept of Nix and the way it handles dependency management and declarative configuration. But I don't think we can pretend that it's easy.