See tracker bug 350792. virtual/blackbox packages: x11-wm/blackbox x11-wm/fluxbox Please convert to a new-style virtual. Or, since it has only two providers and few dependencies, remove the virtual entirely.
In fact, only some of the x11-misc/bb* packages depend on the virtual. And as was pointed out in the tracker bug, these are not even true dependencies. Unless there are objections, I'll remove the virtual in one week from now.
Virtual removed. The only true dependency that I've found was in x11-misc/bbmail. However, this package didn't build with fluxbox, but only with blackbox. I've changed the dependency for bbmail accordingly, and removed it for all other bb* packages.