Message when updating about node libraries

When I do bench update I get the error message below. Everything works fine and the update completes no problem. I am just wondering if I should ignore it or if there is something I could install to stop this message. Any ideas? Thanks.

Updating node libraries...
INFO:bench.utils:npm install
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN frappe@ No description

This is on CentOS7

those are not errors, just warning since those are optional dependencies, used only on MacOS environment

Cool, I thought it might be something like that.