diff --git a/.github/workflows/build-f-droid-apk.yml b/.github/workflows/build-f-droid-apk.yml
index 132ddce..1ae6d25 100644
--- a/.github/workflows/build-f-droid-apk.yml
+++ b/.github/workflows/build-f-droid-apk.yml
@@ -83,8 +83,10 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-gradle-
 
-      - name: Build by eject eas
-        run: npx expo prebuild -p android --clean
+      - name: Build by eject eas and remove debug signing key
+        run: |
+          npx expo prebuild -p android --clean
+          sed -i '/signingConfigs {/,/^[[:space:]]*}/{d;}' android/app/build.gradle
 
       # TODO: https://github.com/tiddly-gittly/TidGi-Mobile/issues/6
       # - name: Remove prorietary bits (for fix f-droid)