Hi, today virtualbox-ose and virtualbox-modules bumped to 3.2.10. But virtualbox-ose-additions didn't bumped to that new version. Therefore virtualbox-ose failed for dependency reasons while the additions use flag is used. A simple rename of the virtualbox-ose-additions-3.2.8 ebuild works for me. Reproducible: Always
It was bumped a bit later than the other vbox packages. Just re-sync and try again.