Creating custom JSON response with Jbuilder

I am attempting to create a custom JSON response in Jbuilder. The scheme is pretty simple:

json.name = @locations.name
json.description = @locations.description

However, I am getting a Missing Template error because I have namespaced my route and cannot use the current index.son.jbuilder. Currently, my route is setup as

Rails.application.routes.draw do
  namespace :api, defaults: {format: 'json'} do
   namespace :v1 do
      resources :locations
    end
  end

  root 'locations#index'
  resources :locations
...

And my controller is pretty simple:

module Api
  module V1
    class LocationsController < ApplicationController
      respond_to :json

      def index
        @locations = Location.all
      end
    end
   end
end

It does not currently use my index.son.jbuilder. I have attempted to create a new json file with matches the naming scheme api.v1.index.son.jbuilder but the error persists. What am I missing?