{ config, pkgs, lib, ... }:
{
  # NixOS wants to enable GRUB by default
  boot.loader.grub.enable = false;
  # Enables the generation of /boot/extlinux/extlinux.conf
  boot.loader.generic-extlinux-compatible.enable = true;

  # A bunch of boot parameters needed for optimal runtime on RPi 3B
  boot.kernelParams = ["cma=32M" "zfs.zfs_arc_max=12884901888"];
  boot.loader.raspberryPi = {
    enable = true;
    version = 3;
    uboot.enable = true;
    firmwareConfig = ''
        hdmi_force_hotplug=1
      '';
  };

  environment.systemPackages = with pkgs; [
    raspberrypi-tools
    git
    htop
    vim
  ];

  # !!! Adding a swap file is optional, but strongly recommended!
  swapDevices = [ { device = "/swapfile"; size = 1024; } ];

  # Configure basic SSH access
  services.openssh = {
    enable = true;
    permitRootLogin = "yes";
  };

  # Cleanup tmp on startup
  boot.cleanTmpDir = true;

  # Set hostname
  networking.hostName = "zion";

  # Create coolneng user
  users.users.coolneng = {
    isNormalUser = true;
    home = "/home/coolneng";
    extraGroups = [ "wheel" "lp" "scanner" ];
    openssh.authorizedKeys.keys = [ "ssh-rsa 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 coolneng@monolith" ];
    shell = "/run/current-system/sw/bin/fish";
  };

  # Set vim as default editor
  programs.vim.defaultEditor = true;

  # Set timezone and synchronize NTP
  time.timeZone = "Europe/Brussels";
  services.timesyncd.enable = true;

  # Enable ZFS support
  networking.hostId = "bb26c304";
  boot = {
    supportedFilesystems = [ "zfs" ];
    zfs.extraPools = [ "vault" ];
  };

  # Scrub zpool monthly
  services.zfs.autoScrub = {
    enable = true;
    interval = "monthly";
  };

  # Auto-upgrade the system and reboot if needed
  system.autoUpgrade = {
    enable = true;
    allowReboot = true;
  };

  # Run Nix garbage collector, while avoiding compiling
  nix = {
    gc = {
      automatic = true;
      options = "--delete-older-than 30d";
    };
    extraOptions = ''
      keep-outputs = true
      gc-keep-outputs = true
    '';
  };

  # Configure fish shell
  programs.fish.enable = true;
  users.users.root.shell = "/run/current-system/sw/bin/fish";

  # Rotate logs after 7 days
  services.journald.extraConfig = "SystemMaxFiles=7";

  # Import other configuration modules
  imports = [
    ./modules/printing.nix
    ./modules/networking.nix
    ./modules/datasync.nix
    ./modules/hardware-configuration.nix
    ./modules/webstack.nix
    ./modules/devops.nix
  ];

}