вызвать flock с node.js?

I have cron job to run node.js scripts.

Want to use flock to lock a file to make sure my cron jobs are not overlapped.

Any good module for doing file locking ?

Or I should call that in child process ?

Or I should not do any file locking ?

Sorry, I am new to this and not sure file locking is good for async env как узел. Спасибо