diff --git a/metadata/com.artifex.mupdf.viewer.app.yml b/metadata/com.artifex.mupdf.viewer.app.yml
index 316ff56530..32d1c62e85 100644
--- a/metadata/com.artifex.mupdf.viewer.app.yml
+++ b/metadata/com.artifex.mupdf.viewer.app.yml
@@ -178,6 +178,10 @@ Builds:
     commit: d9fc37d20edf6862c83c2e96c2e56faa29095eaf
     subdir: app
     submodules: true
+    sudo:
+      - apt-get update || apt-get update
+      - apt-get install -y openjdk-11-jdk-headless
+      - update-alternatives --auto java
     gradle:
       - yes
     prebuild: