The root of the problem is a little earlier in the build log than the provided snippet. javax.faces.component.html should be generated by a previous step in the build, which is failing due to missing dependency/classpath for commons-collections.
I fixed by added a build dependency in debian/control on libcommons-collections-java, and adding commons-collections.jar to the classpath in debian/classpath-debian. I'm not sure if there should also be a runtime dependency on libcommons-collections-java. I assumed not since there were no runtime dependencies specified on the other libcommons-*-java packages. - Roddy Shuler
