diff --git a/metadata/de.neuwirthinformatik.alexander.mtuo.yml b/metadata/de.neuwirthinformatik.alexander.mtuo.yml
index 7743a3169c..13ecbe1d5c 100644
--- a/metadata/de.neuwirthinformatik.alexander.mtuo.yml
+++ b/metadata/de.neuwirthinformatik.alexander.mtuo.yml
@@ -96,7 +96,35 @@ Builds:
       - cp -rf $$Boost-for-Android$$/build/install/* prebuilt/ndk_25_boost_1.79.0/
     ndk: r25
 
+  - versionName: 6.5.1-r4
+    versionCode: 32
+    commit: 4367ab1dd4482affc1205c6bc7be1f3bef8bdb52
+    subdir: app
+    submodules: true
+    sudo:
+      - echo "deb https://deb.debian.org/debian bullseye main" > /etc/apt/sources.list.d/bullseye.list
+      - apt-get update
+      - apt-get install -y build-essential librsvg2-bin wget
+      - apt-get install -y -t bullseye openjdk-11-jdk-headless
+      - update-java-alternatives --set java-1.11.0-openjdk-amd64
+    gradle:
+      - yes
+    srclibs:
+      - boost@boost-1.79.0
+      - Boost-for-Android@ndk_25_boost_1.79.0
+    scandelete:
+      - app/src/main/cpp/tyrant_optimize/*.exe
+      - app/prebuilt/ndk_25_boost_1.79.0/*
+    build:
+      - pushd $$Boost-for-Android$$
+      - mkdir -p build/install/libs/{arm64-v8a,armeabi-v7a,x86,x86_64}
+      - NDK_DIR=$$NDK$$ ABI_NAMES="arm64-v8a armeabi-v7a x86 x86_64" LINKAGES="static"
+        BOOST_DIR=$$boost$$ ./__build.sh
+      - popd
+      - cp -rf $$Boost-for-Android$$/build/install/* prebuilt/ndk_25_boost_1.79.0/
+    ndk: r25
+
 AutoUpdateMode: Version
 UpdateCheckMode: Tags
-CurrentVersion: 6.5.1-r0
-CurrentVersionCode: 29
+CurrentVersion: 6.5.1-r4
+CurrentVersionCode: 32