Latest functional node version for Sage 8.5.1

Hi, I got an error with gulp command on sage 8.5.1

Error: Node Sass does not yet support your current environment: OS X 64-bit with false

I think, the problem is the node version that I’m running: 6.9.4

I saw Node.js >= 4.5 for sage 8.5.1

what is the latest node version that I should install? Thank you!

Latest stable version (6.9.4) works fine.

I fix the problem removing node_modules and npm install: