{
  config,
  lib,
  pkgs,
  nodes,
  ...
}:
{
  imports = [
    ./hardware-configuration.nix
  ];

  boot = {
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
    kernel.sysctl."net.ipv4.ip_forward" = true;
    kernelModules = [
      "kvm-intel"
      "kvm-amd"
    ];
  };

  kat.wireguardPubKey = "2rMQV5fyBhl7t/0j70iPOfEr/lAWQfLXQKMwtzaXxnM=";
  systemd.network = {
    enable = true;
    networks = {
      "50-wg0" = {
        name = "wg0";
        address = [ "10.42.0.1/16" ];
      };
    };
    netdevs = {
      "50-wg0" = {
        netdevConfig = {
          Name = "wg0";
          Kind = "wireguard";
        };
        wireguardConfig = {
          PrivateKeyFile = "/etc/wg/private.key";
        };

        wireguardPeers = [
          {
            Endpoint = "watcher.katvayor.net:1194";
            AllowedIPs = [
              "10.42.0.2/32"
            ];
            PersistentKeepalive = 20;
            PublicKey = nodes.kat-watcher.config.kat.wireguardPubKey;
          }
        ];
      };
    };
  };

  environment.systemPackages = with pkgs; [
    dnsmasq
    tcpdump
  ];

  services.openssh.enable = true;

  programs.virt-manager.enable = true;
  virtualisation.libvirtd.enable = true;

  security.acme = {
    acceptTerms = true;
    defaults.email = "root@katvayor.net";
  };
  kat-proxies = {
    enable = true;
    internal-webroot = pkgs.runCommand "manah" { } ''
      mkdir -p $out/.kat-manah/
      ln -nsf ${./error} $out/.kat-manah/error
    '';
  };

  services.weechat = {
    enable = true;
    binary = "${pkgs.weechat}/bin/weechat-headless";
  };

  networking.firewall = {
    allowedTCPPorts = [
      9000
      9500
      53
    ];
    allowedUDPPorts = [ 67 ];
  };
  system.stateVersion = "23.11";
}