configuration.nix

{ config, pkgs, lib, ... }:

let
  user = "guest";
  password = "guest";
  SSID = "mywifi";
  SSIDpassword = "mypassword";
  interface = "wlan0";
  hostname = "myhostname";
  nixosHardwareVersion = "1bc731fde4af337134331572889de8dd8dbff897";
in {
  imports = ["${fetchTarball "https://github.com/NixOS/nixos-hardware/archive/${nixosHardwareVersion}.tar.gz" }/raspberry-pi/4"];

  fileSystems = {
    "/" = {
      device = "/dev/disk/by-label/NIXOS_SD";
      fsType = "ext4";
      options = [ "noatime" ];
    };
  };

  networking = {
    hostName = hostname;
    wireless = {
      enable = true;
      networks."${SSID}".psk = SSIDpassword;
      interfaces = [ interface ];
    };
  };

  environment.systemPackages = with pkgs; [ vim ];

  services.openssh.enable = true;

  users = {
    mutableUsers = false;
    users."${user}" = {
      isNormalUser = true;
      password = password;
      extraGroups = [ "wheel" ];
    };
  };

  # Enable GPU acceleration
  hardware.raspberry-pi."4".fkms-3d.enable = true;

  services.xserver = {
    enable = true;
    displayManager.lightdm.enable = true;
    desktopManager.xfce.enable = true;
  };

  hardware.pulseaudio.enable = true;
}