{
  config,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib) mkIf mkOption types;
in
{
  options.smayzy.virt.enable = mkOption {
    type = types.bool;
    default = false;
    description = "enable virt-manager and qemu";
  };

  config = mkIf config.smayzy.virt.enable {
    programs.virt-manager.enable = true;
    users.groups.libvirtd.members = [ "smayzy" ];
    virtualisation.libvirtd.enable = true;
    virtualisation.libvirtd.qemu.runAsRoot = false;
    virtualisation.libvirtd.qemu.ovmf.enable = true;

    environment.systemPackages = with pkgs; [
      qemu_kvm
    ];

    # https://wiki.nixos.org/wiki/QEMU
    systemd.tmpfiles.rules = [ "L+ /var/lib/qemu/firmware - - - - ${pkgs.qemu}/share/qemu/firmware" ];
  };
}