diff --git a/.forgejo/workflows/build-apk.yml b/.forgejo/workflows/build-apk.yml
index 262f77a..506f1c9 100644
--- a/.forgejo/workflows/build-apk.yml
+++ b/.forgejo/workflows/build-apk.yml
@@ -51,7 +51,10 @@ jobs:
           BBP_UPLOAD_STORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
           BBP_UPLOAD_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
           BBP_UPLOAD_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
-        run: ./gradlew :app:assembleRelease -PreactNativeArchitectures=arm64-v8a --no-daemon
+          # Force IPv4: the runner's container has no IPv6 route, so dl.google.com
+          # (Google Maven) is "Network is unreachable" over its default AAAA record.
+          GRADLE_OPTS: "-Djava.net.preferIPv4Stack=true -Dorg.gradle.jvmargs=-Djava.net.preferIPv4Stack=true"
+        run: ./gradlew :app:assembleRelease -PreactNativeArchitectures=arm64-v8a --no-daemon -Djava.net.preferIPv4Stack=true
 
       # Self-contained publish via the Forgejo API (no external action to fetch).
       - name: Publish release + upload APK