you cannot set the $P variable inside of an ebuild but the following do: gnome-base/gconf/gconf-2.2.1.ebuild:P=${PN}-${PV} gnome-base/gconf/gconf-2.2.0.ebuild:P=${PN}-${PV} gnome-base/gconf/gconf-2.3.3.ebuild:P=${PN}-${PV}
'should not' , you can see we can. It works fine and we have never heard anyone having problems with it, but for the sake of esthetics (which i value more than anything) and policy never-to-be-broken-for-a-good-reason i added some lines to 2.3.3 to be compliant.