why unacceptable license condition: ruby-license ?

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

Why do I have this a lot?

... has an unacceptable license condition:
ruby-license
You can mark the license ``license'' as acceptable by adding
ACCEPTABLE_LICENSES+= ruby-license
to /etc/mk.conf or by adding
ACCEPTABLE_LICENSES= ruby-license
to /etc/pkg_install.conf.

Okay to add that to DEFAULT_ACCEPTABLE_LICENSES and 
default_acceptable_licenses ?