diff --git a/build.gradle b/build.gradle
index f07d012aa..782f277b5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -113,6 +113,10 @@ android {
     release {
       signingConfig signingConfigs.release
     }
+    packaged {
+      initWith release
+      signingConfig null
+    }
   }
   sourceSets {
     main {
diff --git a/prepare.py b/prepare.py
index 8e2d0db82..ad53ada9c 100755
--- a/prepare.py
+++ b/prepare.py
@@ -341,6 +341,9 @@ uninstall:
 release: java-clean build copy-libs
 \t./gradlew assembleRelease
 
+unsigned: java-clean build copy-libs
+\t./gradlew assemblePackaged
+
 generate-sdk: liblinphone-android-sdk
 
 generate-javadoc: