Browserify transforms not working with paths

b-b.coffee

# << Any invalid Javascript character.

module.exports.hereiam = ->
	console.log("0xDEADBEEF")

b-package.json

{
  "name": "b",
  "version": "1.0.0",
  "main": "b.coffee",
  "browserify": {"transform":["coffeeify"]}
}

compile.js

#!/usr/bin/env node

var opts = {
	paths: ["./b/"],
//	global: true,
//	globalTransform: ['coffeeify'],
};

var bundler = require('browserify')("./index.js", opts);
bundler.bundle().pipe(process.stdout)

index.js

require('./b/b.coffee') // works
require('b.coffee') // does not work

package.json

{
  "browserify": {
        "transform": ["coffeeify"]
  },
  "name": "x",
  "version":"1.0.0"
}

Note that b-* is meant to be b/