diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2cb3c03e..84a25f99 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,9 +1,11 @@
 name: Build
 
 on:
-  - push
-  - pull_request
-  - workflow_dispatch
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
 
 jobs:
   lint:
@@ -33,7 +35,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install "reacton[generate]" ipyvue
+          pip install "reacton[generate]" ipyvue "jupyterlab~=3.0"
 
       - name: build wheel
         run: python -m build
@@ -44,6 +46,10 @@ jobs:
           python -m ipyvuetify.components
           diff ipyvuetify/components.py ipyvuetify/components-previous.py
 
+      - name: Package js
+        run: (cd js && npm pack)
+      - name: show files
+        run: find .
       - name: Upload build artifacts
         uses: actions/upload-artifact@v3
         with:
@@ -103,9 +109,51 @@ jobs:
           name: ipyvuetify-test-results
           path: test-results
 
+  release-dry-run:
+    needs: [test]
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: ipyvuetify-dist-${{ github.run_number }}
+
+      - name: Show files
+        run: find .
+      - name: Install node
+        uses: actions/setup-node@v1
+        with:
+          node-version: "14.x"
+          registry-url: "https://registry.npmjs.org"
+
+      #      - name: Install Python
+      #        uses: actions/setup-python@v2
+      #        with:
+      #          python-version: 3.8
+
+      #      - name: Install dependencies
+      #        run: |
+      #          python -m pip install --upgrade pip
+      #          pip install twine wheel jupyter-packaging jupyterlab
+
+      #      - name: Publish the Python package
+      #        env:
+      #          TWINE_USERNAME: __token__
+      #          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+      #        run: twine upload --skip-existing dist/*
+
+      - name: Publish the NPM package
+        run: |
+          cd js
+          echo $PRE_RELEASE
+          if [[ $PRE_RELEASE == "true" ]]; then export TAG="next"; else export TAG="latest"; fi
+          npm publish --dry-run  --tag ${TAG}  --access public *.tgz
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          PRE_RELEASE: ${{ github.event.release.prerelease }}
+
   release:
     if: startsWith(github.event.ref, 'refs/tags/v')
-    needs: [test]
+    needs: [release-dry-run]
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/download-artifact@v3
@@ -136,6 +184,7 @@ jobs:
 
       - name: Publish the NPM package
         run: |
+          cd js
           echo $PRE_RELEASE
           if [[ $PRE_RELEASE == "true" ]]; then export TAG="next"; else export TAG="latest"; fi
           npm publish --tag ${TAG} --access public *.tgz
diff --git a/MANIFEST.in b/MANIFEST.in
index 27bffa61..1292c3e3 100755
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,3 +5,9 @@ include jupyter-vuetify.json
 recursive-include ipyvuetify/extra *.vue
 recursive-include generate_source/ *.*
 recursive-include js/ *.*
+prune js/node_modules
+prune js/dist
+prune js/lib
+prune generate_source/node_modules
+prune generate_source/dist
+prune generate_source/lib
diff --git a/js/package.json b/js/package.json
index 1223f1e2..c210b4d0 100755
--- a/js/package.json
+++ b/js/package.json
@@ -32,7 +32,7 @@
     "watch:webpack": "webpack --mode development --watch",
     "watch": "run-p watch:*",
     "clean": "rimraf lib/ dist/",
-    "prepare": "run-s build:*",
+    "build": "run-s build:*",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "devDependencies": {
diff --git a/setup.py b/setup.py
index b68c9297..a11da0f6 100644
--- a/setup.py
+++ b/setup.py
@@ -31,8 +31,9 @@ class DecoratedCommand(command):
 
         def run(self):
             """Run the command"""
-            NPMPackage(ROOT / "js" / "package.json").install()
+            NPMPackage(ROOT / "js" / "package.json")._run_npm("ci")
             generate_source.generate()
+            NPMPackage(ROOT / "js" / "package.json").run_script("build")
             self.distribution.data_files = get_data_files()
             command.run(self)