On Sun, 29 Apr 2012 18:20:01 +0200
Ralph Sennhauser <sera@gentoo.org> wrote:
> * IMPLICIT_IUSE
> 
>   Finally allow to write legal ebuilds respecting Prefix wish to not
>   have to add prefix to IUSE. A solution was proposed and approved by
>   council.
> 
>   https://bugs.gentoo.org/show_bug.cgi?id=366555

That one's one of the "things that were left out of EAPI 4".
IMPLICIT_IUSE isn't something you can do on its own without the rest of
the original-EAPI-3 USE cleanup.


-- 
Ciaran McCreesh