diff --git a/metadata/net.taler.merchantpos.yml b/metadata/net.taler.merchantpos.yml
index 8583615555..c5683df069 100644
--- a/metadata/net.taler.merchantpos.yml
+++ b/metadata/net.taler.merchantpos.yml
@@ -56,6 +56,10 @@ Builds:
     versionCode: 6
     commit: 7a09de11feb868abec5bab638585f25410fd0a6b
     subdir: merchant-terminal
+    sudo:
+      - apt-get update
+      - apt-get install -y openjdk-17-jdk-headless
+      - update-java-alternatives -a
     gradle:
       - yes