this post was submitted on 14 May 2025
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The code of the packages is the documentation. So the newcomers better start learning Nix language and reading the paper about how Nix works under the hood before they get started! /s
But seriously, I used NixOs for about 2 years almost 10 years ago and while it was/is fascinating when you have everything setup, getting there and maintaining everything across so many packages that each have their own way of configuring them took hundreds of hours. I'm back on Arch using a custom tool I wrote to fully manage my configs, packages, dotfiles etc.
The way I remember it is that there is no consistency across Nix packages and it all feels like a giant puzzle for people who enjoy spending time configuring more than actually using the computer. And I say that as someone who actually enjoyed getting into that when I had unlimited time.
Okay, but when I figure it out on my desktop I just copy paste the exact snippet to my laptop and it just works.
Do you think I can remember the steps I took to fix my issue with Ubuntu? I don't remember what file I modified and where I put some config file.
But to be fair, Nix is not the only answer to that. There are lots of tools for just dotfiles but you can also build something using e.g. ansible to manage everything.
All my computers have their config in a git repo. That includes users, packages, services, dotfiles, /etc configs and so on. I used ansible before writing my own tool. I can install Arch from scratch and only need to partition, run one script and then apply my config on first boot using my tool to have my system restored. I know it's not as declarative and absolute/reproducible as Nix, but it works and it's way less painful than my last attempt at giving NixOS a go.
I dunno man. I spent way less time configuring my machines on NixOS because it just works. But in fairness, that is after I have spent a lot of time learning it (compared to classic systems that is, not a lot compared to NixOS maintainers who write way better module than I do). Now that there is a foundation, I just run the updates. It's almost scarily stable. And the ability to group related settings together is such a bliss because you no longer wonder about "what did I do to enable X", just open the file, it's all in one place. Stuff that could be three completely different things (e.g. a service specific config file, a PAM entry and the service activation itself in effectively 5 lines. Want to do something for multiple services? Just map over their list. Etc
I happily used Arch for 15 years and after trying NixOS on a decommissioned machine for one day I switched over everything as fast as possible. And I did try out Ansible on Arch, so it's not like I didn't try management via a tool. But using a system like NixOS just solves sooo many potential issues.
It obviously comes with downsides, for example there is no quick configuration change. Changing something small requires another evaluation. Still worth it