Identify Initial Wasp Nest in Mailbox

There is a wasp building a nest in our mailbox. Just buttoning up this project right here. New shut off valves, new garbage disposal, new sink and faucet. When my wife came to me and said, "Hey, Brian, there is a wasp building a nest in our mailbox. You need to fix that." I'm just going to grab my shop back, put a little water in it. We'll put a little attachment on there