>>> emerge net-analyzer/ntop-2.0-r1 to / !!! No message digest file found. /usr/portage/net-analyzer/ntop/files/digest-ntop-2.0-r1 !!! Type "ebuild foo.ebuild digest" to generate a digest. !!! emerge aborting on /usr/portage/net-analyzer/ntop/ntop-2.0-r1.ebuild . Manually generating the digest and then emerging works.
Thanks for catching that :)