{
  inputs,
  username,
  nixpkgsConfig ? {
    allowUnfree = true;
  },
}:

rec {
  mkHost = import ./mk_host.nix;
  foldHosts =
    hosts:
    inputs.nixpkgs.lib.foldl'
      (
        acc: host:
        let
          result = mkHost ({ inherit inputs username nixpkgsConfig; } // host);
        in
        {
          nixosConfigurations = acc.nixosConfigurations // result.nixosConfigurations;
          homeConfigurations = acc.homeConfigurations // result.homeConfigurations;
        }
      )
      {
        nixosConfigurations = { };
        homeConfigurations = { };
      }
      hosts;
}