diff --git a/metadata/de.ktran.anno1404warenrechner.txt b/metadata/de.ktran.anno1404warenrechner.txt
index e7541c0984..5b0a371748 100644
--- a/metadata/de.ktran.anno1404warenrechner.txt
+++ b/metadata/de.ktran.anno1404warenrechner.txt
@@ -17,7 +17,10 @@ Repo:https://github.com/tran-khoa/ANNO1404-Warenrechner-App
 
 Build:1.0,1
     commit=1.0
+    subdir=app
     gradle=yes
+    prebuild=echo 'task wrapper(type: Wrapper) { gradleVersion = "3.3" }' >> build.gradle && \
+        sed -i -e '/retrolambda {/,+3d' build.gradle
 
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 Update Check Mode:Tags