TypeScript: Duplicate identifiers

I’m having an issue with duplicate identifier errors. It appears to stem from having the same definitions listed in multiple places.

Let’s say that I have a simple node server that utilizes the bluebird promise library. I have bluebird used in the main server code and in a library I wrote used by the server code. The structure looks like this:

|-- server.ts
|-- tsd.json
|-- typings
|-- lib
    |-- mylib.ts
    |-- tsd.json
    |-- typings

Here is the code for and for mylib.ts:

/// <reference path="./typings/tsd.d.ts"/>
import Promise = require('bluebird')
class MyLib {
}
export = MyLib

and server.ts:

/// <reference path="./typings/tsd.d.ts"/>
import Promise = require('bluebird')
import MyLib = require('./lib/mylib')
class Server {
}
export = Server

As you can see, both server.ts and mylib.ts use the bluebird library. Since server.ts uses mylib.ts, it ends up importing bluebird twice, which results in errors. So when I run

tsc server.ts --module commonjs

I get

lib/typings/bluebird/bluebird.d.ts(705,9): error TS2300: Duplicate identifier ‘concurrency’. lib/typings/bluebird/bluebird.d.ts(708,9): error TS2300: Duplicate identifier ‘spread’. lib/typings/bluebird/bluebird.d.ts(711,9): error TS2300: Duplicate identifier ‘suffix’. typings/bluebird/bluebird.d.ts(705,9): error TS2300: Duplicate identifier ‘concurrency’. typings/bluebird/bluebird.d.ts(708,9): error TS2300: Duplicate identifier ‘spread’. typings/bluebird/bluebird.d.ts(711,9): error TS2300: Duplicate identifier ‘suffix’.

Tools like npm seem to be able to handle this situation. The only way I can get typescript to handle it is by having a single tsd.json file and corresponding typings folder at the root of my project and having all the typescript definitions live there. Is that the generally accepted way to structure things?