{
  # Evaluates a minimal Home Manager module from `module.nix` and verifies
  # its effect through a throwaway Home Manager configuration.
  description = "A minimal Home Manager module";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

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

  outputs =
    {
      nixpkgs,
      home-manager,
      ...
    }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};

      testConfig = home-manager.lib.homeManagerConfiguration {
        inherit pkgs;
        modules = [
          ./module.nix
          {
            home = {
              username = "learner";
              homeDirectory = "/home/learner";
              stateVersion = "24.11";
            };
            playground.welcome = {
              enable = true;
              name = "flakes";
            };
          }
        ];
      };
    in
    {
      checks.${system}.welcome =
        pkgs.runCommand "home-manager-welcome-check"
          {
            got = testConfig.config.home.file."welcome.txt".text;
            expected = "hello, flakes";
          }
          ''
            if [ "$got" = "$expected" ]; then
              echo ok > "$out"
            else
              echo "unexpected welcome text: $got" >&2
              exit 1
            fi
          '';
    };
}