diff --git a/extra/build_conda_packed.sh b/extra/build_conda_packed.sh
index 71d318d3..d786d628 100755
--- a/extra/build_conda_packed.sh
+++ b/extra/build_conda_packed.sh
@@ -9,7 +9,7 @@ conda activate base || { echo 'failed: conda not installed'; exit 1; }
 
 conda install -y conda-pack
 conda remove -n "$ENV_NAME" -y --all
-conda create -n "$ENV_NAME" -q --force -y "python=$PYTHON_VERSION"
+conda create -n "$ENV_NAME" -q --force -y "python=$PYTHON_VERSION" "nodejs"
 conda-pack -n "$ENV_NAME" -f -o "$ENV_NAME.tar.gz"
 
 # unpack the new environment, that contains only python + pip
@@ -31,6 +31,16 @@ $envdir/bin/python -m pip install --no-input --no-compile git+https://github.com
 $envdir/bin/python -m pip install --no-input --no-compile git+https://github.com/reflectometry/refl1d@webview
 $envdir/bin/python -m pip install --no-compile -r https://raw.githubusercontent.com/bumps/bumps/webview/webview-requirements
 
+# build the client
+cd $envdir/lib/python$PYTHON_VERSION/site-packages/bumps/webview/client
+$envdir/bin/npm install
+$envdir/bin/npm link
+
+cd $envdir/lib/python$PYTHON_VERSION/site-packages/refl1d/webview/client
+$envdir/bin/npm link ../../../bumps/webview/client
+$envdir/bin/npm install
+$envdir/bin/npm run build
+
 version=$($envdir/bin/python -c "import refl1d; print(refl1d.__version__)")
 mv "$tmpdir/$DIRNAME" "$tmpdir/$DIRNAME-$version"
 
diff --git a/refl1d/webview/client/package.json b/refl1d/webview/client/package.json
index 316822b4..25ad44f0 100644
--- a/refl1d/webview/client/package.json
+++ b/refl1d/webview/client/package.json
@@ -15,13 +15,13 @@
     "json-difference": "^1.8.2",
     "mpld3": "^0.5.8",
     "plotly.js": "^2.29.0",
-    "pyodide": "^0.23.2",
     "socket.io-client": "^4.5.2",
     "uuid": "^9.0.0",
     "vue": "^3.2.38",
     "vue-json-viewer": "^3.0.4"
   },
   "devDependencies": {
+    "pyodide": "^0.23.2",
     "@types/plotly.js": "^2.12.5",
     "@types/uuid": "^8.3.4",
     "@vitejs/plugin-vue": "^5.0.4",