While trying to compile qt-creator from source with qt5 I realized that a qt5/help is missing: Project ERROR: Unknown module(s) in QT: help Until now only dev-qt/qthelp-4.8.5-r2 and dev-qt/qthelp-4.8.9999 exists, but none for slot 5. Will this package be added in the future? Reproducible: Always
Yep, the directory src/assistant (which contains QtHelp) of the qttools repo is still TODO.
qthelp is in the overlay now.