[CentOS] Not installing avahi in a kickstart install

Sun Mar 3 21:35:30 UTC 2013
Robert Moskowitz <rgm at htt-consult.com>

In the packages section of my kickstart I have:

-avahi

and I am still getting avahi and all of its rpms installed.  I don't 
want avahi on my servers, how do I specify in a kickstart to NOT install it?