nixos/modules/hardware/dvd/default.nix

{ config, lib, pkgs, ... }:
let cfg = config.hardware.az-dvd;
in {
  options = { hardware.az-dvd.enable = lib.mkEnableOption "DVD"; };

  config = lib.mkIf cfg.enable {
    environment.systemPackages = with pkgs; [
      libaacs
      libbluray
      libdvdcss
      libdvdnav
      libdvdread
    ];
  };
}