This bug tracks the implementation of the EAPI 3 feature mentioned in the summary.
This is in svn r13382.
(In reply to comment #1) > This is in svn r13382. Via gitweb: http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=2e822610660c8578ac61bf4da2d68489facc2033
*** Bug 151647 has been marked as a duplicate of this bug. ***