Call hubot only javascript

hubot_call.js

// set package.json and `npm init`
// or 
// $npm install init;
// $npm install hubot --save
// $npm install coffee-script --save
var fork = require('child_process').fork
var fs = require("fs")

var env = {
  //"HUBOT_IRC_SERVER"  : "",
}

var coffee = "node_modules/coffee-script/bin/coffee"
var args = [
  "node_modules/hubot/bin/hubot"
]

var hubot = fork(coffee, args, {
  env : env
})

package.json

{
  "name": "",
  "version": "0.0.0",
  "main": "index.js",
  "dependencies": {
    "hubot": "~2.4.6",
    "coffee-script": "~1.4.0",
  }
}