{
  config,
  lib,
  pkgs,
  sources,
  ...
}:
let
  host = "betamail.katvayor.net";
in
{
  imports = [
    "${sources.nixos-mailserver}"
    ./hardware-configuration.nix
    ./disks.nix
    ./modo.nix
  ];

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.supportedFilesystems = [ "bcachefs" ];
  boot.kernelPackages = pkgs.linuxPackages_latest;

  time.timeZone = "Europe/Paris";

  networking = {
    interfaces."enp1s0" = {
      useDHCP = false;
      ipv4.addresses = [
        {
          address = "192.168.122.3";
          prefixLength = 24;
        }
      ];
      ipv6.addresses = [
        {
          address = "fe80::3";
          prefixLength = 64;
        }
      ];
    };
    defaultGateway = "192.168.122.1";
    defaultGateway6 = {
      address = "fe80::1";
      interface = "enp1s0";
    };
    nameservers = [
      "192.168.122.1"
      "fe80::1%enp1s0"
    ];
  };

  i18n.defaultLocale = "en_US.UTF-8";
  console = {
    font = "Lat2-Terminus16";
    keyMap = "fr";
  };

  services.dbus.packages = with pkgs; [ dconf ];

  nixpkgs.config.allowUnfree = true;

  programs.zsh.enable = true;

  environment.systemPackages = with pkgs; [
    wget
    nix-search-cli
    git
    btop
    ranger
    screen
  ];

  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };

  services.openssh.enable = true;

  networking.firewall.enable = false;

  security.acme = {
    acceptTerms = true;
    defaults.email = "root@katvayor.net";
  };
  services.nginx = {
    enable = true;
    virtualHosts."betamail.katvayor.net" = {
      enableACME = true;
      addSSL = true;
      locations."/" = {
        recommendedProxySettings = true;
        proxyPass = "http://localhost:8000/";
      };
    };
  };

  mailserver = {
    enable = true;
    fqdn = host;
    domains = [ host ];

    loginAccounts = {
      "root@${host}" = {
        catchAll = [ host ];
        aliases = builtins.genList (id: "user${toString id}@${host}") 10 ++ [ "moderators@${host}" ];
        hashedPassword = "$2b$05$FoCVDECXYG0KXPigPuIZtuNFiviwSg8RuXx0FbnzC7ZRp.Mz8VWOe";
      };
    };

    certificateScheme = "acme";
  };

  system.stateVersion = "23.11";
}