{ depot, lib, pkgs, rebuilder, ... }:
{ config, ... }:
let
  inherit (depot.ops) secrets;
in {
  imports = [ ./bird.nix ];

  boot.initrd.availableKernelModules = [
    "ata_piix"
    "vmw_pvscsi"
    "sd_mod"
    "sr_mod"
  ];
  boot.kernelModules = [ "tcp_bbr" ];
  boot.kernel.sysctl = {
    "net.ipv6.conf.default.accept_ra" = 0;
    "net.ipv6.conf.all.accept_ra" = 0;
    "net.ipv6.conf.default.autoconf" = 0;
    "net.ipv6.conf.all.autoconf" = 0;
  };

  fileSystems = {
    "/" = {
      device = "/dev/disk/by-uuid/fafafa2b-ec19-40ae-bd04-cc286beb2946";
      fsType = "ext4";
    };
  };
  swapDevices = [
    { device = "/dev/disk/by-uuid/9920239c-492f-4f79-8a06-8f412d047605"; }
  ];

  nix.maxJobs = lib.mkDefault 2;
  hardware.enableRedistributableFirmware = true;

  nixpkgs.config = { allowUnfree = true; };

  nix.nixPath = [ "depot=/home/lukegb/depot/" "nixpkgs=/home/lukegb/depot/third_party/nixpkgs/" ];

  # Use GRUB2.
  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  boot.loader.grub.device = "/dev/sda";

  # Networking!
  networking = {
    hostName = "ixvm-fra01"; # Define your hostname.
    domain = "as205479.net";
    nameservers = ["8.8.8.8" "8.8.4.4"];
    useDHCP = false;
    defaultGateway = {
      address = "141.98.136.97"; interface = "ens-inet";
    };
    defaultGateway6 = {
      address = "2a09:11c0:f1:bc0b::1"; interface = "ens-inet";
    };
    interfaces = {
      ens-inet = {
        ipv4.addresses = [
          { address = "141.98.136.124"; prefixLength = 27; }
        ];
        ipv6.addresses = [
          { address = "2a09:11c0:f1:bc0b::2"; prefixLength = 64; }
        ];
      };
      ens-kleyrex = {
        ipv4.addresses = [
          { address = "193.189.83.41"; prefixLength = 23; }
        ];
        ipv6.addresses = [
          { address = "2001:7f8:33::a120:5479:1"; prefixLength = 48; }
        ];
      };
      ens-locix = {
        ipv4.addresses = [
          { address = "185.1.166.219"; prefixLength = 23; }
        ];
        ipv6.addresses = [
          { address = "2001:7f8:f2:e1::a20:5479:1"; prefixLength = 48; }
        ];
      };
      ens-nlix = {
        ipv4.addresses = [
          { address = "193.239.118.225"; prefixLength = 22; }
        ];
        ipv6.addresses = [
          { address = "2001:7f8:13::a520:5479:1"; prefixLength = 64; }
        ];
      };
    };
  };
  services.udev.extraRules = ''
    ATTR{address}=="00:50:56:a3:b0:5e", NAME="ens-inet"
    ATTR{address}=="00:50:56:a3:27:bd", NAME="ens-kleyrex"
    ATTR{address}=="00:50:56:a3:95:72", NAME="ens-locix"
    ATTR{address}=="00:50:56:a3:6e:0f", NAME="ens-nlix"
  '';

  # Select internationalisation properties.
  i18n.defaultLocale = "en_GB.UTF-8";
  console.keyMap = "us";

  # Set your time zone.
  time.timeZone = "Etc/UTC";

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    vim
    mercurial
    rxvt_unicode.terminfo
    rebuilder
  ];

  programs.mtr.enable = true;
  services.openssh.enable = true;

  networking.firewall = {
    allowPing = true;
  };

  # Define a user account.
  users.mutableUsers = false;
  users.users = {
    root.hashedPassword = secrets.passwordHashes.root;
    lukegb = {
      isNormalUser = true;
      uid = 1000;
      extraGroups = [ "wheel" "networkmanager" "bird2" ];
      hashedPassword = secrets.passwordHashes.root;
    };
  };

  boot.kernel.sysctl."net.ipv4.tcp_congestion_control" = "bbr";
  boot.kernel.sysctl."net.core.default_qdisc" = "fq_codel";

  system.stateVersion = "20.03";
}