Browserify + Grunt + Remapify: Cannot Find Module

I've read all the docs and several solutions here, but I can't seem to get Remapify configured properly in my Grunt-Browserify config.

Here are two few variations I've tried, both resulting in the error "Cannot find module..."

browserify: {

  options: {
    preBundleCB: function (b) {
      b.plugin(remapify, [{
        cwd: './dev/js/modules',
        src: './**/*.js',
        expose: 'modules'
      }]);
    }
  }
}


browserify: {

  options: {
    preBundleCB: function (b) {
      b.plugin(remapify, [{
        cwd: __dirname,
        src: '.dev/js/modules/**/*.js',
        expose: 'modules'
      }]);
    }
  }
}

Does anyone see what I'm doing wrong?