nix-config VS impermanence

All the resources mentioned in other comments are pretty good, but mostly they are unofficial. The official NixOS wiki is very outdated and unmaintained. You will have better luck reading other people’s configurations, nixpkgs source code and GitHub issues. For the nix language the official wiki is a nice reference https://nixos.org/manual/nix/stable/language/index.html. This configuration is a great starting point https://github.com/Misterio77/nix-config for learning by example. It covers most of what you may need, although bootstrapping your own config is quite rough. You may want to take a look at https://github.com/Misterio77/nix-starter-configs. It’s very basic and should be simple to understand and improve.

Yes. E.g. some guy's config with 6 different machines[1]: multiple desktops, laptops, servers, a Raspberry Pi, and a VPS. That's a rather advanced use of Nix for configuration, but definitely shows what it's capable of.

[1] https://github.com/Misterio77/nix-config

https://github.com/Misterio77/nix-config/blob/main/hosts/celaeno/services/hydra/lib/release-host-branch.nix https://github.com/Misterio77/nix-config/blob/main/hosts/celaeno/services/hydra/default.nix#L39

Implementation: https://github.com/Misterio77/nix-config/blob/main/pkgs/fetch-packwiz-pack/default.nix

the one i reference all the time is https://github.com/Misterio77/nix-config

I believe Misterio77's does use it in his config.

I reuse the same btrfs logic on all my computers, including a RPi: https://github.com/Misterio77/nix-config/blob/main/hosts/common/btrfs-optin-persistence.nix

You might want to set up NixOS with impermanence, with something like https://github.com/nix-community/impermanence. Install an easy to use desktop environment like ElementaryOS, and configure NixOS with or without Flatpak, if you want to give the user the ability to install new software or not. Then set up automatic updates, automatic garbage collection and you have a truly stable system.

I would not call these projects unbelievable, but they are neat.

- Opt-in state: https://github.com/nix-community/impermanence and https://grahamc.com/blog/erase-your-darlings/

That way will work - I use the impermanence module which works similarly but allows to hide mounts.

This is indeed a blind spot. Thanks for pointing that out! Silverblue -to my knowledge- doesn't do a lot to address this. Though, 3rd-party tools like Home Manager and the suite of applications developed by the folks over at uBlue might be able to limit this to a minimum. Though I'm not sure if it surpasses NixOS in this regard; for the uninitiated. Though, to my knowledge, this requires special attention and depends on the specifics of the NixOS system in question.

[3]: https://github.com/nix-community/impermanence

I have recently stumbled upon Impermanence - modules to help you handle persistent state on systems with ephemeral root storage, and the concept seems quite nice.

I haven't used it yet but nix-community/impermanence has a home-manager module that might be useful.

Some files in /etc (like saved networks) will still not be managed by NixOS, if you want to have full control over them use Impermanence

{ imports = [ (modulesPath + "/installer/scan/not-detected.nix") "${builtins.fetchGit { url = "https://github.com/NixOS/nixos-hardware.git"; }}/system76" "${builtins.fetchGit { url = "https://github.com/nix-community/impermanence.git"; }}/nixos.nix" ];