return err
	}
	return nil
}

func installSimulator(appdir string) error {
	cmd := exec.Command(
		"xcrun", "simctl", "install",
		"booted", // Install to the booted simulator.
		appdir,
	)
	if out, err := cmd.CombinedOutput(); err != nil {
		os.Stderr.Write(out)
		return fmt.Errorf("xcrun simctl install booted %q: %v", appdir, err)
	}
	return nil
}