diff --git a/metadata/com.fsck.k9.yml b/metadata/com.fsck.k9.yml
index bb7f65296c..0274b90ab6 100644
--- a/metadata/com.fsck.k9.yml
+++ b/metadata/com.fsck.k9.yml
@@ -482,9 +482,7 @@ Builds:
     output: app/k9mail/build/outputs/apk/release/k9mail-release-unsigned.apk
     rm:
       - tools/android-studio/settings.jar
-    prebuild:
-      - echo 'org.gradle.jvmargs=-Xmx1g' >> gradle.properties
-      - sed -i -e 's/6.0.1/5.6.4/' gradle/wrapper/gradle-wrapper.properties
+    prebuild: sed -i -e 's/6.0.1/5.6.4/' gradle/wrapper/gradle-wrapper.properties
 
 MaintainerNotes: |-
     Use output instead of subdir to make gradlew-fdroid correctly determine the gradle version to be used.