nix flake update issue

[aspauldingcode]

This is definitely not a good title for this issue but.

after updating a universal nix flake, I get nix-darwin error telling me to use nixpkgs-24.11-darwin.

There's a problem. I define everything within all nixos/darwin modules to point to the same nixpkgs input, which I set to either stable or unstable as
nixpkgs/nixos-24.11 or nixpkgs/nixos-unstable.

current flake (working before flake update):
https://github.com/aspauldingcode/.dotfiles/blob/main/flake.nix
the offending change modifies this input:

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11"; # Set to the desired stable version
    unstable_nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

and requires me to think outside the box. I don't think that warning is enough for users like me to figure out what to do about it.

[aspauldingcode]

more specifically: the error is telling me to use -darwin.
without nixpkgs, I cannot just use the isDarwin or isLinux function to do an if/else sort of thing.

[emilazy]

nixos-24.11 will work too (more or less; it’s suboptimal in the way that nixos-unstable is suboptimal, i.e. stuff is more likely to be broken on Darwin, but it will pass the release check).

[emilazy]

Did you try following the instructions given? If there’s anything in particular about them you find confusing we can try to explain or reword them to help others in future.

[aspauldingcode]

I think the issue is falsely firing.

I ran a rebuild after switching the channels in my flake right back to nixos ones, and it works fine

[emilazy]

I cannot reproduce the issue after cloning your flake and switching the nixpkgs input to nixos-24.11. Can you give full reproduction instructions?

[aspauldingcode]

Hi,

I've got rid of the issue by temporarily changing the inputs for nixpkgs and unstable_nixpkgs, rebuilding then changing them back and rebuilding and it's fine.

As far as reproducibility, I have no clue. Seemed to fire just after a nix flake update, that's the only way I know how it happened.

You might have to clone a previous commit, then run nix flake update, then rebuild and see what happens.