The ebuild is marked as interactive and calls check_license. However, when a user has the PUEL license already accepted via ACCEPT_LICENSE, the license is not shown and is already implicitly accepted. So the interactive flag is useless and on top of that quite annoying when it forces a -vauDN world to be --jobs 1. So please make sure the PUEL license is in the EULA group and rely on ACCEPT_LICENSE.
+ 20 Oct 2010; Lars Wendler <polynomial-c@gentoo.org> + virtualbox-ose-additions-3.1.8.ebuild, + virtualbox-ose-additions-3.2.8.ebuild, + virtualbox-ose-additions-3.2.10.ebuild: + Removed INTERACTIVE stuff from ebuilds now that we have a working license + management in portage. Thanks to a3li for pointing this out in bug + #336795. +