Looks like we need extra steps to build the jar signing
plugin
diff --git a/org.eclipse.e4.builder/scripts/buildCBI.sh b/org.eclipse.e4.builder/scripts/buildCBI.sh
index 2af66c3..0920d83 100755
--- a/org.eclipse.e4.builder/scripts/buildCBI.sh
+++ b/org.eclipse.e4.builder/scripts/buildCBI.sh
@@ -200,7 +200,7 @@
 
 
 pushd org.eclipse.cbi.maven.plugins
-mvn -f eclipse-jarsigner-plugin/pom.xml \
+mvn -X \
 clean install \
 -Dmaven.repo.local=$localMavenRepo
 popd