diff --git a/metadata/cx.ring.yml b/metadata/cx.ring.yml
index 5a4272ec7c..e3a32c563a 100644
--- a/metadata/cx.ring.yml
+++ b/metadata/cx.ring.yml
@@ -1461,9 +1461,11 @@ Builds:
     submodules: true
     sudo:
       - apt-get update || apt-get update
+      - apt-get install -y openjdk-11-jdk-headless
       - apt-get install -y -t testing swig
       - apt-get install -y -t stretch-backports-sloppy libarchive13
       - apt-get install -y -t stretch-backports cmake
+      - update-alternatives --auto java
     gradle:
       - noPush
     rm: