diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d542c120a..ee6db9c28 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -66,12 +66,18 @@ jobs:
       run: |
         python -m pip install --upgrade pip wheel
         python -m pip install setuptools jupyter_packaging "jupyterlab>=3,<4"
-    - name: Build packages
+    - name: Build pypi distributions
       run: |
         python setup.py sdist bdist_wheel
+    - name: Build npm distributions
+      run: |
+        jlpm lerna exec -- npm pack
+        cp packages/*/*.tgz dist
+    - name: Build checksum file
+      run: |
         cd dist
         sha256sum * | tee SHA256SUMS
-    - name: Upload builds
+    - name: Upload distributions
       uses: actions/upload-artifact@v2
       with:
         name: dist ${{ github.run_number }}