diff --git a/metadata/cc.narumi.chaldea.fdroid.yml b/metadata/cc.narumi.chaldea.fdroid.yml
index 8955efe74f..d22c58a7ef 100644
--- a/metadata/cc.narumi.chaldea.fdroid.yml
+++ b/metadata/cc.narumi.chaldea.fdroid.yml
@@ -222,7 +222,7 @@ Builds:
       - test
       - web
       - windows
-    prebuild: $ANDROID_HOME/tools/bin/sdkmanager 'cmake;3.10.2.4988404'
+    prebuild: JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 $$SDK$$/tools/bin/sdkmanager 'cmake;3.10.2.4988404'
     build:
       - $$flutter$$/bin/flutter config --no-analytics
       - $$flutter$$/bin/flutter build apk --flavor fdroid