diff --git a/.github/workflows/build_push.yml b/.github/workflows/build_push.yml
index c897b901..b9ec4cae 100644
--- a/.github/workflows/build_push.yml
+++ b/.github/workflows/build_push.yml
@@ -89,13 +89,17 @@ jobs:
 
       - name: Prepare signing key
         run: |
-          echo ${{ secrets.SIGNING_KEY }} | base64 -d > signingkey.jks
+          echo "${{ secrets.SIGNING_KEY }}" | base64 -di > signingkey.jks
+          # Verify key is properly created
+          ls -la signingkey.jks
+          keytool -list -v -keystore signingkey.jks -storepass "${{ secrets.KEY_STORE_PASSWORD }}" -alias "${{ secrets.ALIAS }}" || exit 1
 
       - name: Build extensions (${{ matrix.chunk.number }})
         env:
-          ALIAS: ${{ secrets.ALIAS }}
-          KEY_STORE_PASSWORD: ${{ secrets.KEY_STORE_PASSWORD }}
-          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
+          ORG_GRADLE_PROJECT_storeFile: signingkey.jks
+          ORG_GRADLE_PROJECT_storePassword: ${{ secrets.KEY_STORE_PASSWORD }}
+          ORG_GRADLE_PROJECT_keyAlias: ${{ secrets.ALIAS }}
+          ORG_GRADLE_PROJECT_keyPassword: ${{ secrets.KEY_PASSWORD }}
         run: |
           ./gradlew $(echo '${{ toJson(matrix.chunk.modules) }}' | jq -r 'join(" ")')