diff --git a/tools/run_tests/build_package_node.sh b/tools/run_tests/build_package_node.sh
index 4a21104e28980eb2e9ff36d7b0eb99fa9df15c60..e98fabbc5f04b0f9213b1edefddfb6d99f0fbf75 100755
--- a/tools/run_tests/build_package_node.sh
+++ b/tools/run_tests/build_package_node.sh
@@ -53,7 +53,7 @@ cd src/node/tools
 npm update
 npm pack
 cp grpc-tools-*.tgz $artifacts/
-tools_version=$(npm list | grep -oP '(?<=grpc-tools@)\\S+')
+tools_version=$(npm list | grep -oP '(?<=grpc-tools@)\S+')
 
 output_dir=$artifacts/grpc-precompiled-binaries/node/grpc-tools/$tools_version
 mkdir -p $output_dir