diff --git a/metadata/com.ichi2.anki.txt b/metadata/com.ichi2.anki.txt
index 03477689a7..a944cf1a09 100644
--- a/metadata/com.ichi2.anki.txt
+++ b/metadata/com.ichi2.anki.txt
@@ -156,6 +156,7 @@ Build:2.4.2,20402300
     gradle=yes
     rm=tools,docs
     scanignore=AnkiDroid/src/main/java/com/ichi2/libanki/hooks/ExternalHookLoader.java
+    prebuild=sed -i -e '/BUILD_TOOLS_VERSION/d' ../ShowcaseView/gradle.properties && echo -e "\n\nBUILD_TOOLS_VERSION=20.0.0" >> ../ShowcaseView/gradle.properties
 
 Maintainer Notes:
 Uses DexLoader to load custom decks and plugins (?).