{ ... }:
{
  nix = {
    distributedBuilds = true;
    buildMachines = [
      {
        hostName = "freun.dev";
        maxJobs = 8;
        protocol = "ssh";
        sshUser = "builder";
        systems = [
          "aarch64-linux"
        ];
        supportedFeatures = [
          "kvm"
          "big-parallel"
          "nixos-test"
        ];
      }
    ];
    settings = {
      experimental-features = [
        "nix-command"
        "flakes"
      ];
      auto-optimise-store = true;
    };

    gc = {
      automatic = true;
      dates = "daily";
      options = "--delete-older-than 7d";
    };
  };

  networking.nftables.enable = true;

  # This option defines the first version of NixOS you have installed on this particular machine,
  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
  #
  # Most users should NEVER change this value after the initial install, for any reason,
  # even if you've upgraded your system to a new NixOS release.
  #
  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
  # so changing it will NOT upgrade your system.
  #
  # This value being lower than the current NixOS release does NOT mean your system is
  # out of date, out of support, or vulnerable.
  #
  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
  # and migrated your data accordingly.
  #
  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
  system.stateVersion = "23.11"; # Did you read the comment?
}