npm ERR! Path must be a string. Received undefined

This may be related to `bundledDependencies` being an array of file names rather than package names in package.json.

```
$ npm install testla
npm ERR! Darwin 14.5.0
npm ERR! argv "/usr/local/bin/iojs" "/usr/local/bin/npm" "install" "testla"
npm ERR! node v4.1.1
npm ERR! npm v3.3.5

npm ERR! Path must be a string. Received undefined
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!

npm ERR! Please include the following file with any support request:
npm ERR! /Users/dan/npm-debug.log
```