Installing external modules #8

I am trying to install the http-proxy module from nodejitsu: https://github.com/nodejitsu/node-http-proxy but I get this error:

I am including by writing this in invoking_file.js:

var http = require('external/node_modules/http-proxy');

but I get this error:

Uncaught Error: Cannot find module 'external/node_modules/http-proxy' on node.js 44

This is my directory structure:

• invoking_file.js
  • external
    • node.js
    • node_modules
      • http-proxy.js
      • http-proxy