Using the programmatic API, I try to bundle a file and expose it with a simple name:

bundle.expose(path, { expose: 'simpleName' }')

The resulting file keeps the path as the module identifier.
I digged in the source code and the problematic part seems to be:
https://github.com/substack/node-browserify/blob/master/index.js#L119-L126

I'm on windows and my path is C:\Folder\file.ext and the regex test evaluates to false (path don't start by . or /) so the id is set to the path.
Then the exposed name is not assigned since the id is already defined.

I don't really get what is the purpose of lines 119-121 but I guess it needs to be changed to support windows. If someone can explain it to me I can try to submit a pull request with windows support.

Edit:
It could also be a bug (I don't see why the expose parameter shouldn't be used in any case),
in that case changing the line 121 with : xtend(opts, { id: (expose || file), file: file }) should fix the problem.