diff --git a/.github/workflows/release-nightly.yml b/.github/workflows/release-nightly.yml
index 017516e535..0310927cf0 100644
--- a/.github/workflows/release-nightly.yml
+++ b/.github/workflows/release-nightly.yml
@@ -145,12 +145,12 @@ jobs:
           skip-branch-cleanup: true
           force-skip-tests: "${{ github.event_name != 'schedule' && github.event.inputs.force_skip_tests == 'true' }}"
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
-          npm-registry-publish-url: '${{ vars.NPM_REGISTRY_PUBLISH_URL }}'
-          npm-registry-url: '${{ vars.NPM_REGISTRY_URL }}'
-          npm-registry-scope: '${{ vars.NPM_REGISTRY_SCOPE }}'
-          cli-package-name: '${{ vars.CLI_PACKAGE_NAME }}'
-          core-package-name: '${{ vars.CORE_PACKAGE_NAME }}'
-          a2a-package-name: '${{ vars.A2A_PACKAGE_NAME }}'
+          npm-registry-publish-url: "${{ vars.NPM_REGISTRY_PUBLISH_URL || 'https://registry.npmjs.org/' }}"
+          npm-registry-url: "${{ vars.NPM_REGISTRY_URL || 'https://registry.npmjs.org/' }}"
+          npm-registry-scope: "${{ vars.NPM_REGISTRY_SCOPE || '@google' }}"
+          cli-package-name: "${{ vars.CLI_PACKAGE_NAME || '@google/gemini-cli' }}"
+          core-package-name: "${{ vars.CORE_PACKAGE_NAME || '@google/gemini-cli-core' }}"
+          a2a-package-name: "${{ vars.A2A_PACKAGE_NAME || '@google/gemini-cli-a2a-server' }}"
 
       - name: 'Create and Merge Pull Request'
         if: "github.event.inputs.environment != 'dev'"