Both emerge f-prot and vlnx install them in /opt/ and it seems that Amavis' ebuilt install and configure script can't find them there and exits with an error: >>> Unpacking source... >>> Unpacking amavis-0.3.12pre8.tar.gz checking *** FRISK F-Prot Antivirus for Linux *** checking for f-prot... no checking for f-prot.sh... no checking *** FRISK F-Prot Antivirus for Linux (Daemon) *** checking for fprotd... no checking *** McAfee Virusscan *** checking for uvscan... no checking if any virus scanners are installed at all... no obelix www # emerge -s f-prot Searching... [ Results for search key : f-prot ] [ Applications found : 1 ] * net-mail/f-prot Latest version available: 3.12c Latest version installed: 3.12c Size of downloaded files: 1,828 kB Homepage: http://www.f-prot.com/ Description: Frisk Software's f-prot virus scanner obelix www # emerge -s vlnx Searching... [ Results for search key : vlnx ] [ Applications found : 1 ] * net-mail/vlnx Latest version available: 416e Latest version installed: 416e Size of downloaded files: 7,961 kB Homepage: http://www.mcafee.com/ Description: McAfee VirusScanner for Unix/Linux(Shareware) Not really sure if this is a problem with Amavis' install or f-prot and vlnx, you guys can fight it out. :-) But generally, not much else goes into /opt so maybe these packages should go in /usr/sbin or suchlike?
amavis-0.3.12_pre8 has been updated in portage to be able to detect f-prot and vlnx.