Confirm paths, and import depth

[bashfulrobot]

Hi there, I think I have a misunderstanding on how Haumea works.

I have:

tree src/.
src/.
├── archetype
│   └── workstation.nix
├── modules
│   ├── betterbird.nix
│   └── firefox.nix
└── suites
    └── office.nix

flake.nix:

{
<snipped>

  inputs = {

    haumea = {
      url = "github:nix-community/haumea/v0.2.2";
      inputs.nixpkgs.follows = "nixpkgs";
    };
<snipped>

  };

  outputs = inputs@{ self, nixpkgs, home-manager, nixos-hardware, haumea, ... }:
    with inputs;
    let
      nixpkgsConfig = { overlays = [ ]; };
     
    in {

      lib = haumea.lib.load {
        src = ./src;
        inputs = { inherit (nixpkgs) lib; };
      };

      nixosConfigurations = {
      <snipped>
      };
    };
}

Then for the workstation.nix I have something like:

{ config, pkgs, lib, ... }:
let cfg = config.archetype.workstation;
in {
  config = lib.mkIf cfg.enable {

    suites = {
      office.enable = true;
    };

  };
}

and for office.nix I have:

{ config, pkgs, lib, ... }:
let cfg = config.suites.office;
in {
  config = lib.mkIf cfg.enable {

    programs = {
      firefox.enable = true;
      betterbird.enable = true;
    };

  };
}

and just as an example, for firefox.nix:

{ config, pkgs, lib, ... }:
let
    cfg = config.programs.firefox;
in
 {
  config = lib.mkIf cfg.enable {
    environment.systemPackages = with pkgs; [ firefox ];
  };
}

So my impression was that all of my files in my src folder would be imported.

And then by enabling the configs I had created using lib.mkIf I would be able to enable the configurations I wanted.

So my flow is essentially:

flake.nix --> imports all files in src --> workstation.nix --> office.nix --> firefox.nix

But when I rebuild I get:

error: The option `archetype' does not exist. Definition values:
       - In `/nix/store/i9czzb50vfnr1l1y7l6jzm89f8xiwnzp-source/systems/rembot/config':
           {
             workstation = true;
           }

Which makes me think the auto importing works different than I thought. Any tips? Is there another way I should be calling the options?

and with regards to the src file, how many folders deep will nix files be imported? Just one layer deep?
Thank you for your time.