Isn’t it just smarter to clear your actual build folder and then rebuild it with a script? Bonus points if you limit resources to it so it takes ages? That way if they ever actually look closely, they’ll see it’s the REAL work you’re supposed to be doing that’s building, and you’ll never get in trouble
If you were a boss and you were staring at my screen all day, I’d find another job ;).
In all seriousness though, we’re assuming in this case that you’re taking a break, and a stakeholder happens to walk past - hopefully not a constant occurrence.