diff --git a/metadata/com.nutomic.syncthingandroid.yml b/metadata/com.nutomic.syncthingandroid.yml
index ee219e5b66..f2beac8848 100644
--- a/metadata/com.nutomic.syncthingandroid.yml
+++ b/metadata/com.nutomic.syncthingandroid.yml
@@ -1848,19 +1848,19 @@ Builds:
   - versionName: 1.21.0
     versionCode: 4319
     commit: 3dc29468bc9ef9ca6dfcbc651bf9c3be641cf409
+    subdir: app
     submodules: true
     sudo:
       - apt-get update
-      - apt-get install -y golang-go
+      - apt-get install -y -t bullseye-backports golang-go
     gradle:
       - yes
-    output: app/build/outputs/apk/release/app-release-unsigned.apk
-    prebuild: sed -i -e '/signingConfig/d' app/build.gradle
+    prebuild: sed -i -e '/signingConfig/d' build.gradle
     scanignore:
       - syncthing/src/github.com/syncthing/syncthing/lib/model/testdata
     ndk: r23
     preassemble:
-      - buildNative
+      - :syncthing:buildNative
 
 MaintainerNotes: |-
     The submodule in syncthing/src/github.com/syncthing/syncthing must be