{
  flake.modules.nixos.core = {lib, ...}: {
    i18n.defaultLocale = "en_US.UTF-8";

    # Anti-lockout.
    services.openssh.enable = true;
    users.users.root.openssh.authorizedKeys.keys = [lib.arta.liljamoPubKey];

    security.pki.certificates = [(builtins.readFile ../../files/certs/lab.pem)];
  };
}