Home-manager: Errors when defining services in flake

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Hi there, I’m pretty new to NixOS, and I have worked through this guide to get started and get started with flakes. I’ve been tinkering with publicly available configs and everything has been mostly working fine, but now I ran into a bit of a roadblock. When trying to define services in my home-manager modules, I get the following error message:

       error: undefined variable 'hm'

       at /nix/store/d5wq3bcaafv5msw7lcjcyq5g20pjk5zn-source/modules/services/swayidle.nix:112:8:

          111|     assertions = [
          112|       (hm.assertions.assertPlatform "services.swayidle" pkgs platforms.linux)
             |        ^
          113|     ];

The only reference i found to this error is here:

The comment mentions to make sure that the module is included in the correct configuration (i.e. home-manager), but to the best of my current knowledge, I think I am. These are parts of my current config, I am not sure if the rest is relevant, but can update if needed. My flake.nix:

{
  description = "NixOS configuration of cluosh";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nixpkgs-wayland = {
      url = "github:nix-community/nixpkgs-wayland";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    hyprland.url = "github:hyprwm/Hyprland";
  };

  outputs = {
    self,
    nixpkgs,
    home-manager,
    ...
  }@inputs: let
    lib = nixpkgs.lib;
  in rec {
    nixosConfigurations = {
      test = lib.nixosSystem {
        system = "x86_64-linux";

        modules = [
          ./hosts/test

          home-manager.nixosModules.home-manager {
            home-manager = {
              useGlobalPkgs = true;
              useUserPackages = true;
              extraSpecialArgs = {
                inherit inputs lib;
              };
              users.cluosh = ./home;
            };
          }
        ];
      };
    };
  };
}

My ./home/default.nix:

{
  config,
  pkgs,
  ...
}: {
  imports = [
    ./programs
    #./desktop/hyprland
  ];

  home = {
    username = "cluosh";
    homeDirectory = "/home/cluosh";

    stateVersion = "23.05";
  };

  services = {
    swayidle.enable = true;
  };

  # Let Home Manager install and manage itself.
  programs.home-manager.enable = true;
}

The services are used somewhere further down in my hyprland config, but i just moved the swayidle services to my top home module for debugging. The error happens with anything defined as a service, not just swayidle. I have a feeling I am missing something very obvious, but I haven’t been able to figure it out myself and would be thankful for some pointers.

2

Okay, I figured out what broke it. I thought lib was something that I had to inherit manually, but it does seem to just be available and passing it manually als extraSpecialArgs breaks things.

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