source feature generation failing for openshift: Missing sources for plugins

mvn clean install

[INFO] org.jboss.tools.openshift.express.feature ......... FAILURE [0.511s]

[ERROR] Failed to execute goal org.eclipse.tycho.extras:tycho-source-feature-plugin:0.15.0:source-feature (source-feature) on project org.jboss.tools.openshift.express.feature: Could not generate source feature for project MavenProject: org.jboss.tools.openshift.features:org.jboss.tools.openshift.express.feature:2.4.0-SNAPSHOT @ /home/nboldt/eclipse/workspace-jboss/jbosstools-github/jbosstools-openshift/features/org.jboss.tools.openshift.express.feature/pom.xml
[ERROR] Missing sources for plugins [org.jboss.tools.openshift.express.client_2.4.0.CR1-v20121107-0221]