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The original was posted on /r/nixos by /u/plebianlinux on 2025-10-27 09:26:33+00:00.

Hey,

Since there was no real good online resource on this and this only clicked for me after looking at the Lix install docs, here’s the simple way of using the DetSys nix fork, without the closed source determinate-nix deamon.

In your flake.nix, import nix-src:

# https://github.com/DeterminateSystems/nix-src/releases
determinate.url = "https://flakehub.com/f/DeterminateSystems/nix-src/3.12.0.tar.gz";

Now it’s as simple as setting nix.package = inputs.determinate.packages.${pkgs.system}.default;

And that’s it. I was having constant issues with cache.flakehub.com, and since I’m using my own binary cache it doesn’t make sense to have this deamon hanging on my system.

Cheers