node-ninjaでcoffeescriptを使うの術

package.json

{
    "name": "Your App Name"
  , "version": "0.0.1"
  , "dependencies" : {
    "coffee-script": ">= 1.1.2"
  }
  , "devDependencies" : {
    "npm" : "latest"
  }
  , "scripts" : {
    "start" : "coffee app.coffee"
  }
}

server.js

var npm = require('npm')
var conf = {}
npm.load(conf, function (er) {
  if (er) return handlError(er);
    npm.commands.start([], function (er, data) {
      if (er) return commandFailed(er);
    });
    npm.on("log", function (message) {
    })
  }
)

function commandFailed(er){
  console.log(er);
}

function handleError(er){
  console.log(er);
}