{
  config,
  pkgs,
  modulesPath,
  ...
}: {
  imports = [
    # enable home manager
    <home-manager/nixos>
    (modulesPath + "/installer/scan/not-detected.nix")
  ];

  nixpkgs.config = {
    allowUnfree = true;
    permittedInsecurePackages = [
      "electron-12.2.3"
    ];
  };

  boot.loader = {
    systemd-boot.enable = true;
    efi.canTouchEfiVariables = true;
  };

  networking = {
    # wireless.enable = true;  # Enables wireless support via wpa_supplicant.
    # wireless.userControlled.enable = true;

    # Enable networking
    networkmanager.enable = true;

    firewall = {
      enable = true;
      allowedTCPPortRanges = [
        {
          # KDE Connect
          from = 1714;
          to = 1764;
        }
      ];
      allowedUDPPortRanges = [
        {
          # KDE Connect
          from = 1714;
          to = 1764;
        }
      ];
    };
  };

  time.timeZone = "Europe/Berlin";
  i18n = {
    defaultLocale = "en_US.UTF-8";
    extraLocaleSettings = {
      LC_ADDRESS = "de_DE.UTF-8";
      LC_IDENTIFICATION = "de_DE.UTF-8";
      LC_MEASUREMENT = "de_DE.UTF-8";
      LC_MONETARY = "de_DE.UTF-8";
      LC_NAME = "de_DE.UTF-8";
      LC_NUMERIC = "de_DE.UTF-8";
      LC_PAPER = "de_DE.UTF-8";
      LC_TELEPHONE = "de_DE.UTF-8";
      LC_TIME = "de_DE.UTF-8";
    };
  };

  services = {
    xserver = {
      # Enable the X11 windowing system / wayland depending on DE
      enable = true;

      # Configure keymap in X11
      layout = "de";
      xkbVariant = "";
    };

    # Enable CUPS to print documents.
    printing.enable = true;

    # Enable the OpenSSH daemon.
    openssh = {
      enable = true;
      settings = {
        PermitRootLogin = "no";
        PasswordAuthentication = false;
        KbdInteractiveAuthentication = false;
      };
    };
  };

  # Configure console keymap
  console.keyMap = "de";

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  system = {
    stateVersion = "22.11";
    autoUpgrade.enable = true; # enable auto updates
  };

  nix.gc = {
    automatic = true;
    dates = "00:30";
  };

  programs = {
    git = {
      enable = true;
      package = pkgs.gitFull;
    };

    steam = {
      enable = true;
      remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
      dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
    };

    zsh.enable = true;
  };

  environment = {
    pathsToLink = ["/share/zsh"];

    # List packages installed in system profile.
    # systemPackages = [];
  };
}