NixOS Raspberry Pi 4 configuration

configuration.nix

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

  let
    user = "guest";
    password = "guest";
    SSID = "mywifi";
    SSIDpassword = "mypassword";
    interface = "wlan0";
    hostname = "myhostname";
  in {
    imports = ["${fetchTarball "https://github.com/NixOS/nixos-hardware/archive/936e4649098d6a5e0762058cb7687be1b2d90550.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;
  }