Error: cannot find module './lib/middleware'

I am attempting to run the demo for the mobwrite node.js package. First I installed the mobwrite package (npm install mobwrite) and then entered the following command:

node -e "require('mobwrite').quickserve()"

A demo server should start, but the following error is thrown:

module.js:340    throw err;          ^Error: Cannot find module './lib/middleware'  at Function.Module._resolveFilename (module.js:388:15)  at Function.Module._load (module.js:280:25)  at Module.require (module.js:364:17)  at require (module.js:380:17)  at Object.<anonymous> (PATH_TO_MODULES\mobwrite.js:2:18)  at Module._compile (module.js:456:26)  at Object.Module._extensions..js (module.js:474:10)  at Module.load (module.js:356:32)  at Function.Module._load (module.js:312:12)  at Module.require (module.js:364:17)  at require (module.js:380:17)  at [eval]:1:1  at Object.<anonymous> ([eval]-wrapper:6:22)  at Module._compie (module.js:456:26)  at evalScript (node.js:532:25)  at startup (node.js:80:7)  at node.js:901:3

This originates from the mobwrite.js file, in which the package needs to include a middleware file (middleware.coffee) which is stored in a lib folder:

require("coffee-script")middleware = require("./lib/middleware")module.exports = middleware

I have looked at the answers to similar posts on SO, but nothing has solved my problem so far. How can I overcome this error?