As mentioned in the postinst section of media-sound/pulseaudio-15.0-r1, qpaeq needs dev-python/PyQt5. PyQt5 got depcleaned here and now invoking qpaeq fails with exit status 255 and the following lines: There was an error importing needed libraries Make sure you have qt5 and dbus-python installed The error that occurred was: No module named 'PyQt5' Reproducible: Always
It's an optional runtime dependency. We do not add optional runtime dependencies to RDEPEND.