macOS SDK installer doesn't work. project packaged as jar beans cannot inject ActiveObjects

I’ve build a Conf plug-in project by hand and have it compiling and deploying. But I’m getting errors like:

Error creating bean with name ‘x.y.z.servlet.ddapp.DdAppServlet’: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘com.atlassian.activeobjects.external.ActiveObjects’ available

What am I missing?