TypeScript Version: v1.8.10

1. Create a basic external npm package 'node_modules/ext'. In it, set up the following 2 files:

   // ext.d.ts
   declare var _default: {};
   export default _default;
   
   // package.json (edit it)
     "main": "ext",
     "typings": "ext",
   

2. Reference package 'ext' from A.ts, using --declaration, generating A.d.ts

   // A.ts
   import ext from 'ext';
   
   declare module 'ext' { }
   

3. Copy A.d.ts to another directory, that has the ext package installed in node_modules
   // B.ts import * as modA from './A'

Expected behavior:
Generated A.d.ts causes no errors because typed package 'ext' was in the correct location.

Actual behavior:
A.d.ts(1,16): error TS2664: Invalid module name in augmentation, module 'ext' cannot be found.

Workarounds:

• explicitly import 'ext' module while in B
• re-export something from B as part of A (triggering an import to be generated in A.d.ts)

Remarks:
This is frustrating because the fact that A depended on 'ext' was an implementation detail, and in reality npm was the one that brought 'ext' into node_modules.

Thoughts?