Commons Privilizer is built using Maven 3 in typical fashion. Things to know:
Since the whole point of the Privilizer relates to Java security, it is only natural that its tests be executable with Java security enabled. It is also reasonable to test without security enabled, to show that your code works as always. The example and ant/test modules each have a sec profile defined; You can run their tests with this profile enabled to turn on Java security.
Located at ant/test, this module's tests are implemented by unpacking the source of the example module and reusing it. For this reason, the example module must have been packaged previously to executing the ant/test tests, so in a multimodule build you should at least specify the package phase of the default lifecycle. Alternatively, you can disable this module's tests by deactivating the profile in which they are set up: antlib-test.
Similarly, when building the project site you should deactivate the antlib-test profile, to stop this modules tests from requiring the example module to have been previously packaged.