Understanding dependencies

[giannidoe at mac.com]

Hi
I've got a bit of a newbie question:

When I first compiled the maildrop port using 'make WITH_AUTHLIB=yes'  
a menu popped up allowing me to select which authentication modules  
to include, I checked the MySQL module by mistake which resulted in  
MySQL getting installed as a dependency.
I then tried to start again after running pkg_delete + make clean but  
when I re-run 'make WITH_AUTHLIB=yes' I no longer get the menu to  
select the authentication modules and MySQL is installed again.
How can I remove the dependency to MySQL and start from fresh?
Thanks
Gianni