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this post was submitted on 25 Mar 2024
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Question: are you using Flakes?
I've been kinda dipping my toes on NixOS but the flakes are really throwing a wrench my way.... Yet they are apparently NixOS' future so I'm just kinda stuck
Yeah. Flakes are essentially three things (or four if you count the new CLI):
That's it, essentially nothing else changes. It's just a different entry point to Nix code including NixOS configurations.
Here's a great article (apparently, I have only skimmed it myself) explaining flakes more in detail: https://jade.fyi/blog/flakes-arent-real/
Flakes on the system level aren't too bad. You can pretty much just keep your configuration.nix, but now you call that from a flake.nix. The difference is you remove all your nix-channels and you specify your nixpkgs in your flake.nix. So its really using a flake instead of nix-channels.
The cool part is when you nixos-rebuild the first time, it will save your nixpkgs version in a flake.lock. Then it will stay that way until you choose to upgrade with
nix flake update
. Nice and stable.I felt the same, but I'm reading through this book and so far it's been helpful for understanding and setting up system flakes: https://nixos-and-flakes.thiscute.world/
use flakes