Maintaining PORTDIR in make.comf is usually not useful these days because it is already on repos.conf/gentoo.conf.
This is effectively duplicate of bug #560518.
(In reply to Arfrever Frehtes Taifersar Arahesis from comment #1) > This is effectively duplicate of bug #560518. Not really. The one you posted is about catalyst while mine is about portage/Gentoo in general
It only exists in the stage3 make.conf because catalyst puts it there.
(In reply to Ben Kohler from comment #3) > It only exists in the stage3 make.conf because catalyst puts it there. *** This bug has been marked as a duplicate of bug 560518 ***