Zope 3 ebuild are missing (~)amd64 keywords.
Dear Anders, could You please outline here which exact version from 3.x.y family You tested on amd64 arch?
I am running net-zope/zope-3.3.0 on my amd64 system at the moment. I have not tried any other Zope 3 versions on it.
need emerge --info
Created attachment 108111 [details] emerge --info from AMD64 system
reopen
added ~amd64