Avoid blaming the user for mistakes they make due to us not preventing them.

Blaming the user at any stage such as:

"You have forgotten to do ..."

"Did you remember to ..."

is bad user experience.

Example: https://github.com/qt/qtbase/tree/d89cef439f5c1a58aeff879a12d9a33292764b7f/lib (In this case that folder should just not exist and be created when it is about to be filled, without that message.)

They might have forgotten for many reasons, but the reason of those reasons is us. Prevent them from making those mistakes, instead of blaming them for the mistakes they have made due to us not being clear enough, and/or our build process not being automated enough.