The current package.json references the module "fs" version 0.0.2 as dependency.

This comes from a time where the npm registry allowed to publish modules with Node core module names.

The problem is that the module does not make any sense and installs an annoying spam message:

$ cat node_modules/fs/index.js
console.log("I'm `fs` modules");

The assumption is that the intention is to not install the module and that it was a mistake.

Further reference: http://status.npmjs.org/incidents/dw8cr1lwxkcr