CoffeeScript: ImapConnection未在node-imap中定义

Question

我正在尝试从CoffeScript and node-imap运行示例咖啡脚本

发送消息很好，但是当我尝试读取消息时，我得到了这样的错误：

TypeError: imap.ImapConnection is not a function
  at Object.<anonymous> (/home/rmatuszak/Dokumenty/NodeJS/mail/coffee2/read.coffee:15:14)
  at Object.<anonymous> (/home/rmatuszak/Dokumenty/NodeJS/mail/coffee2/read.coffee:7:1)
  at Module._compile (module.js:409:26)
  at Object.exports.run (/usr/lib/node_modules/coffee-script/lib/coffee-script/coffee-script.js:134:23)
  at compileScript (/usr/lib/node_modules/coffee-script/lib/coffee-script/command.js:224:29)
  at compilePath (/usr/lib/node_modules/coffee-script/lib/coffee-script/command.js:174:14)
  at Object.exports.run (/usr/lib/node_modules/coffee-script/lib/coffee-script/command.js:98:20)
  at Object.<anonymous> (/usr/lib/node_modules/coffee-script/bin/coffee:7:41)
  at Module._compile (module.js:409:26)
  at Object.Module._extensions..js (module.js:416:10)
  at Module.load (module.js:343:32)
  at Function.Module._load (module.js:300:12)
  at Function.Module.runMain (module.js:441:10)
  at startup (node.js:139:18)
  at node.js:968:3

在这篇文章的首页上，有人提到了这个问题，但没有得到回答。有没有人有这样的问题？