Help with apache PKG_OPTIONS handling

[newhouse%rockhead.com@localhost (Paul Newhouse)]

What is the correct way to turn on the PKG_OPTIONS for apache22?
This isn't working:

   : grep apache /etc/mk.conf
   /etc/mk.conf:PKG_OPTIONS.apache += suexec
   /etc/mk.conf:PKG_OPTIONS.apache += apache-shared-modules
   
   : (cd www/apache22 && make show-options)
   Any of the following general options may be selected:
           apache-shared-modules   Build all modules as shared for apache22.
           suexec  
   
   These options are enabled by default:
   
   These options are currently enabled:
           suexec
   
   You can select which build options to use by setting PKG_DEFAULT_OPTIONS
   or PKG_OPTIONS.apache.

I can manipulate the options for other packages this way (i.e. - mk.conf 
settings)

Where did I go wrong?

TIA,
Paul