nix-config/system/dev/qemu.nix

{
  config,
  lib,
  pkgs,
  ...
}:
with lib; let
  cfg = config.mySystem.dev.qemu;
in {
  options.mySystem.dev.qemu = {
    enable = mkEnableOption "Enable QEMU";
    users = mkOption {
      type = types.listOf types.str;
      default = ["phundrak"];
      example = ["user1" "user2"];
    };
  };
  config = mkIf cfg.enable {
    programs.virt-manager.enable = true;
    users.groups.libvirtd.members = cfg.users;
    virtualisation = {
      libvirtd.enable = true;
      spiceUSBRedirection.enable = true;
    };
    environment.systemPackages = with pkgs; [
      qemu
      quickemu
      swtpm
    ];
    systemd.tmpfiles.rules = ["L+ /var/lib/qemu/firmware - - - - ${pkgs.qemu}/share/qemu/firmware"];
    boot.binfmt.emulatedSystems = ["aarch64-linux"];
  };
}