By default the example will be started with MyFaces 2.3 and Jetty 9.
$ mvn jetty:run -Pjetty
For Jetty 10 use the profile jee8.
$ mvn jetty:run -Pjetty -Pjee8
You can select a specific JSF implementation with the
jsf variable, like Mojarra.
$ mvn jetty:run -Djsf=mojarra-2.3