diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 499045b8..6ed37e0c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -129,7 +129,7 @@ jobs:
         run: |
           echo "${{ secrets.keystore }}" | base64 -d > release.keystore
           cd android-project
-          ./gradlew packageRelease \
+          ./gradlew $([ -n "$SIGNING_KEY_ALIAS" ] && echo packageRelease || echo assembleDebug ) \
             --info \
             -PcmakeArgs="-DCMAKE_BUILD_TYPE=Release \
               -DISLE_USE_DX5=${{ !!matrix.dx5 }} \
diff --git a/android-project/app/build.gradle b/android-project/app/build.gradle
index 23298981..eb1616f5 100644
--- a/android-project/app/build.gradle
+++ b/android-project/app/build.gradle
@@ -37,7 +37,7 @@ android {
             enableV4Signing = true
             keyAlias = System.getenv("SIGNING_KEY_ALIAS")
             keyPassword = System.getenv("SIGNING_KEY_PASSWORD")
-            storeFile = file(System.getenv("SIGNING_STORE_FILE"))
+            System.getenv("SIGNING_STORE_FILE")?.with { storeFile = file(it) }
             storePassword = System.getenv("SIGNING_STORE_PASSWORD")
         }
     }