Problema na instalacao do amavis-perl

[Carlos Rocha]

checking for perl... /usr/bin/perl
checking for perl modules...
        module not found in path: 'Archive/Tar'.
configure: error: You are missing some perl modules.  Please check the
README
===>  Script "configure" failed unexpectedly.
Please report the problem to ports at FreeBSD.org [maintainer] and attach the
"/usr/ports/security/amavis-perl/work/amavis-perl-11/config.log" including
the output of the failure of your make command. Also, it might be a good
idea
to provide an overview of all packages installed on your system (e.g. an `ls
/var/db/pkg`).
*** Error code 1