node.js – Npm安装失败,“无法在wd中运行”

我试图让我的节点环境设置在一个新的Ubuntu 12.04实例，已经安装了节点0.8.14，但我遇到了问题，当我试图运行npm install。
所以当我尝试npm安装，它说，我需要运行它作为root或adminisrator：

Error: EACCES,mkdir '/usr/local/lib/node_modules/coffee-script'
npm ERR!  { [Error: EACCES,mkdir '/usr/local/lib/node_modules/coffee-script']
npm ERR!   errno: 3,npm ERR!   code: 'EACCES',npm ERR!   path: '/usr/local/lib/node_modules/coffee-script',npm ERR!   fstream_type: 'Directory',npm ERR!   fstream_path: '/usr/local/lib/node_modules/coffee-script',npm ERR!   fstream_class: 'DirWriter',npm ERR!   fstream_stack: 
npm ERR!    [ 'DirWriter._create                 (/usr/local/lib/node_modules/npm/node_modules/fstream/lib/dir-writer.js:36:23)',npm ERR!      '/usr/local/lib/node_modules/npm/node_modules/mkdirp/index.js:37:53',npm ERR!      'Object.oncomplete (fs.js:297:15)' ] }
npm ERR! 
npm ERR! Please try running this command again as root/Administrator.

但是当尝试以sudo运行时，它说如下：

npm WARN cAnnot run in wd PackNodeDev@0.0.1-166 npm install -g coffee-script node-gyp (wd=/home/ubuntu/PackNodE)

在我的package.json中，它包含以下脚本：

"scripts": {
    "preinstall": "npm install -g coffee-script node-gyp","start": "node server.js","test": "mocha --require should --compilers coffee:coffee-script --colors"
 },

其余的devdependencies是有效的，因为我一直在我自己的机器上安装它(MaC)
有谁有一个线索为什么这种情况发生？

[sudo] npm install --unsafe-perm

"config": {
    "unsafe-perm":true
}

sudo npm install -g coffee-script node-gyp
npm install