diff --git a/metadata/com.wabadaba.dziennik.txt b/metadata/com.wabadaba.dziennik.txt
index 3c3df7cef9..566df9c369 100644
--- a/metadata/com.wabadaba.dziennik.txt
+++ b/metadata/com.wabadaba.dziennik.txt
@@ -14,12 +14,13 @@ Client for the Polish school system Synergia Librus.
 Repo Type:git
 Repo:https://github.com/shymmq/librus-client-kotlin
 
-Build:0.2.1,3
+Build:0.2.1-fdroid,3
     commit=0.2.1
     subdir=app
     patch=0001-Remove-GCM.patch
     gradle=full
     output=build/outputs/apk/full/release/app-full-release-unsigned.apk
+    prebuild=sed -i -e 's/0.2.1/0.2.1-fdroid/' build.gradle
 
 Auto Update Mode:None
 Update Check Mode:Tags