[M2] Best way to define plugin prefixes?

I've got some custom built plugins that I need to execute from the cmd line. E.g., mvn myplug:dosomething The Guide for plugin development on the Maven 2 site indicates that to define the prefix "myplug", I need to have the following in my ~/.m2/settings.xml org.myproject.plugins

Maven2 Ant Plugin Build gives Warning about Goal prefix?

When building my Ant plugin, it gives this warning: [INFO] Building SOAJ PLUGINS :: ADMIN [INFO]task-segment: [install] [INFO] [INFO] [plugin:descriptor] [WARNING] Goal prefix is: admin; Maven currently expects it