{
  lib,
  config,
  inputs,
  ...
}:
let
  inherit (lib.options) mkOption;
  inherit (lib.types) path lazyAttrsOf raw;
  inherit (inputs.flake-parts.lib) mkSubmoduleOptions;
  inherit (cfg.lib.attrsets) firstAttrNameMatching;
  cfg = config.flake;
  username = firstAttrNameMatching (_: v: v.primary or false) cfg.manifest.users;
in
{
  options.flake = mkSubmoduleOptions {
    lib = mkOption {
      type = lazyAttrsOf raw;
      default = { };
    };
    root = mkOption {
      type = path;
      default = "";
    };
    admin = mkOption {
      type = lazyAttrsOf raw;
      default = { };
    };
  };

  config.flake.admin = cfg.manifest.users.${username} // {
    inherit username;
  };
}