installing extension doesn't expose DBpedia choice

[kgeographer]

I've added this extension to a clone of OpenRefine 2.8 according to the README, and performed an ant build. The console reports "BUILD SUCCESSFUL" but there are two project errors (below) and when I run OpenRefine, access to DBpedia reconciliation is not an option, or evident anywhere I can see. Any ideas?

'The declared package "com.google.refine.tests.model" does not match the expected package "com.google.refine.tests.browsing.facets"' also 'The declared package "com.google.refine.tests.model" does not match the expected package "com.google.refine.tests.operations.cell"'