See:
http://www.nabble.com/multiple-goal-passes-in-m2-builds-td14516333.html

We've got the odd maven2 plugin that requires muliple invokations of
maven to run correctly.
For example:

http://mojo.codehaus.org/dashboard-maven-plugin/continuum.html

Short of building as freestyle rather than m2, is there a more
integrated way of specifying a sequence of invokations to run?