In portage 2.1 when using buildpkg the files are created in
and symlinked point here is created as
In portage 2.2 it only makes
The documentation (that is man page) does not reflect this change in Portage operation. The man page in question is man 1 ebuild.
I don't know how to make patches for man pages otherwise I'd attach one.
Both layouts are still supported. If the $PKGDIR/All/ directory exists then the old layout is used, except in cases when collisions need to be resolved in order to avoid bug #133908.
This is fixed in 2.2_rc15.