Modified npm package path in build.sh
set -ex
$PYTHON -m pip install . -vv
-npm pack ${PKG_NAME}@${PKG_VERSION}
+npm pack jupyter-widget-datetime@${PKG_VERSION}
mkdir -p ${PREFIX}/share/jupyter/lab/extensions/js
cp ${PKG_NAME}-${PKG_VERSION}.tgz ${PREFIX}/share/jupyter/lab/extensions/js
