This is really a less-than-excellent resolution. I got it work (tentatively, not using an updated pom yet) after realizing spacebase 2.2 (the version available on your main page download link) is incompatible with quasar 0.7.3. Luckily I worked around it by pulling 2.3-SNAPSHOT from the spaceships-demo project.
It might not be worth the time or aligned with your goals, but if you hosted an up-to-date spacebase repository, it would sure be useful!