This bug tracks the implementation of the EAPI 3 feature mentioned in the summary.
Fixed in r13768.
(In reply to comment #1) > Fixed in r13768. Via gitweb: http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=e1a2a0fdc08dc1deb019baf2fa98e1a133830e9a