error: cannot look up '<nixos-wsl/modules>' in pure evaluation mode even with flake.nix looking good?

[BojanKV]

Hej :)

I have similar but not the same issue as in #369 , when i include my configuration.nix beside nixos-wsl.nixosModules.default, as in NixOS-WSL/how-to/nix-flakes.html

It works if i remove path to my configuration file, but that is not what i want.

Did anyone came across it, as I've tried answer from the original Q&A thread and also from howto and it still fails with:

       error: cannot look up '<nixos-wsl/modules>' in pure evaluation mode (use '--impure' to override)
       at «none»:0: (source not available)

My flake.nix is as below. Note that i've tried also to use different nixpkgs versions just to test.

{
  description = "NixOS configurations for different hosts";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
    nixpkgs-wsl.url = "github:NixOS/nixpkgs/nixos-23.11"; # Specify the nixpkgs version
    nixos-wsl.url = "github:nix-community/NixOS-WSL/main";
  };

  outputs = { self, nixpkgs, nixpkgs-wsl, nixos-wsl, ... }:
    let
      system = "x86_64-linux";
    in
    {
      nixosConfigurations.ikob-cloud = nixpkgs.lib.nixosSystem {
        system = system;
        modules = [
          ./hosts/hetzner/configuration.nix
        ];
      };

      nixosConfigurations.wsl = nixpkgs-wsl.lib.nixosSystem {
        system = system;
        modules = [
          ./hosts/wsl/configuration.nix

          nixos-wsl.nixosModules.default
          {
            system.stateVersion = "24.05";
            wsl.enable = true;
          }
        ];
      };
    };
}

[BojanKV]

I think i found culprit 🗡️ :D

Based on initial #369 i've added #<nixos-wsl/modules> in configuration.nix when trying that solution, but then also forgot about it when i did how-to way.

Now when I removed it from my configuration.nix, it worked :)