waikiki portage # pwd
/usr/local/portage
waikiki portage # ls
net-p2p
waikiki portage # ls net-p2p/
retroshare-0.3.52a.ebuild
waikiki portage # ebuild net-p2p/retroshare-0.3.52a.ebuild digest
Appending /usr/local to PORTDIR_OVERLAY...
!!! /usr/local/portage/net-p2p/retroshare-0.3.52a.ebuild does not seem to have a valid PORTDIR structure.