{
  description = "Steam ROM Manager Home Manager Module";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    # home-manager is declared so consumers can do
    #   inputs.home-manager.follows = "steam-rom-manager/home-manager"
    # and so nix flake check can instantiate the module correctly.
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      home-manager,
    }:
    let
      # Linux systems where Steam (and AppImages) are supported.
      # Darwin is intentionally excluded: the SRM AppImage is Linux-only.
      linuxSystems = [
        "x86_64-linux"
        "aarch64-linux"
      ];
      forLinux = nixpkgs.lib.genAttrs linuxSystems;
    in
    {
      # Home Manager module — available under both the conventional .default
      # key and an explicit name for clarity in consumer flakes.
      homeManagerModules.default = import ./modules/steam-rom-manager;
      homeManagerModules.steam-rom-manager = import ./modules/steam-rom-manager;

      # `nix flake check` target: instantiate the module with a minimal config
      # to catch evaluation errors before they reach users.
      checks = forLinux (
        system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
          hmLib = home-manager.lib;
        in
        {
          module-eval =
            (hmLib.homeManagerConfiguration {
              inherit pkgs;
              modules = [
                self.homeManagerModules.default
                {
                  home = {
                    username = "test";
                    homeDirectory = "/home/test";
                    stateVersion = "24.11";
                  };
                  programs.steam-rom-manager = {
                    enable = true;
                    steamUsername = "testuser";
                    emulators = {
                      # ROM parsers
                      retroarch.enable = true; # cross-platform
                      mgba.enable = true; # cross-platform
                      # Platform parsers (no package)
                      epic.enable = true;
                      "itch.io".enable = true;
                      # Disabled flag
                      flycast = {
                        enable = true;
                        disabled = true;
                      };
                    };
                  };
                }
              ];
            }).activationPackage;
        }
      );
    };
}