Ensure that node-pre-gyp is properly bundled
diff --git a/tools/run_tests/build_package_node.sh b/tools/run_tests/build_package_node.sh
index a8b9448..aca90a3 100755
--- a/tools/run_tests/build_package_node.sh
+++ b/tools/run_tests/build_package_node.sh
@@ -38,6 +38,7 @@
 mkdir -p artifacts/
 cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=node,platform={windows,linux,macos}/artifacts/* artifacts/ || true
 
+npm update
 npm pack
 
 cp grpc-*.tgz artifacts/grpc.tgz