{ inputs, self, ... }: {
  flake.nixosModules.global = { config, pkgs, lib, ... }: {
    programs.${config.features.shells.defaultShell}.enable = true;

    users.defaultUserShell = pkgs.${config.features.shells.defaultShell};
    users.users."grey".shell = pkgs.${config.features.shells.defaultShell};

    features.shells.${config.features.shells.defaultShell}.enable = true;
  };
}