{
  lib,
  inputs,
  self,
}:
let
  # TODO: refactor the registry code
  registryAssembly = import ./registry.nix { inherit lib self; };

  util = import ../lib { inherit lib; };
  mkModules = import ./module.nix { inherit util; };

  modules = mkModules {
    root = self + "/modules";
  };

  guestModules = guests.mkGuests {
    root = self + "/guests";
  };

  #----------------------------------------------------------

  collectedRegistry = registryAssembly.collect { hosts = self.nixosConfigurations; };

  specialArgs = {
    inherit
      inputs
      self
      util
      ;
    registry = collectedRegistry;
  };

  guests = import ./guest.nix {
    inherit
      inputs
      lib
      specialArgs
      registryAssembly
      util
      ;
    repositoryModules = modules;
  };

  hosts = import ./host.nix {
    inherit
      inputs
      lib
      specialArgs
      guestModules
      registryAssembly
      ;
    repositoryModules = modules;
  };
in
{
  inherit (hosts) mkHosts;
}