diff --git a/concourse/tasks/build-mvn-cache.sh b/concourse/tasks/build-mvn-cache.sh
index dc1b97c0b..d212f0a6d 100755
--- a/concourse/tasks/build-mvn-cache.sh
+++ b/concourse/tasks/build-mvn-cache.sh
@@ -5,6 +5,9 @@ workdir=`pwd`
 cd ${workdir}/sts4/headless-services
 ./mvnw -DskipTests package
 
+cd ${workdir}/sts4/headless-services/jdt-ls-extension
+./mvnw -DskipTests package
+
 timestamp=`date +%s`
 tarfile=${workdir}/out/sts4-mvn-cache-${timestamp}.tar.gz
 tar -czvf ${tarfile} -C ${HOME} .m2/repository