Npm install WARN unmet dependency

[ben]

This isn’t an issue with Sage, this is an issue with your environment.

Npm Debugging Guidelines (Failed npm install, bower install, or gulp build? Read this)

Sage is tested on Travis CI with every commit to make sure that npm install, bower install, and gulp all work properly. Bugs can still pop up, but usually there’s something wrong with your environment if you can’t get things running. If you’re running into problems, first make sure that your development environment meets the minimum requirements: Node.js >= 4.5.0 gulp >= 3.8.10 Bower >= 1.3.12 Ensure you’re using the latest version of npm: npm install -g npm@latest Then run npm cache clear &…

Googling your error brings up lots of results. What have you tried besides removing the node_modules directory, and have you tried that multiple times?

This isn’t the appropriate place for Node support. Stack Overflow is better suited for these types of questions.