This finds unsatisfied runtime dependencies so that Vagrant, Metasploit, etc. don't break so often:
```
====> Compressing man pages (compress-man)
====> Running Q/A tests (stage-qa)
RubyGem dependency archive-tar-minitar ["= 0.5.2"] is not satisfied
*** Error code 1
Stop.
make: stopped in /usr/home/lifanov/src/svn/freebsd/ports/head/archivers/rubygem-fpm
```