{vpn_enable, ...}: {
  imports = [
    ../system/bootloader.nix
    ../system/firewall.nix
    ../system/locale.nix
    ../system/network.nix
    ../system/term.nix
    ../system/development.nix
    # ../system/proxy.nix
    # ../system/recovery.nix # only supports non-flake conf
    ../system/ssh.nix
    ../system/timezone.nix
    # ../system/touchpad.nix
    ../system/users.nix
    ../system/tools.nix
    (if vpn_enable then ../system/vpn.nix else null)
  ];
}