FYI If you ever have to fix the osgi bundles if they break, read this comment: # NOTE: the OSGi error reporting is messed up: # If drools-core fails to start, it will report an error with drools-compiler. # To look past that messed up error reporting, comment out the reported bundle(s) here to see the real troublesome bundle in this file: droolsjbpm/droolsjbpm-build-distribution/drools-osgi-bundles/org.drools.osgi.test/src/test/filtered-resources/boot-bundles.properties For example, first I got ERROR - AbstractOsgiTests.startBundle(344) | cannot start bundle [jBPM :: BPMN2 (org.jbpm.bpmn2;singleton:=true)|file:/.../jbpm-bpmn2-6.0.0-SNAPSHOT.jar] org.osgi.framework.BundleException: The bundle could not be resolved. Reason: Missing Constraint: Require-Bundle: org.jbpm.flow.builder; bundle-version="6.0.0.SNAPSHOT" But after commenting out jbpm-bpmn2, the real problem surfaced: ERROR - AbstractOsgiTests.startBundle(344) | cannot start bundle [jBPM :: Flow (org.jbpm.flow.core;singleton:=true)|file:/.../jbpm-flow-6.0.0-SNAPSHOT.jar] org.osgi.framework.BundleException: The bundle could not be resolved. Reason: Missing Constraint: Import-Package: org.joda.time; version="1.6.0" HTH