Unable generate schemas when import is used

When I try to generate schema from this:

``` typescript

import {User} from "users/user";

export interface Post {
    id?: string;
    name: string;
    createdAt: Date;
    updatedAt: Date;
    user: User;
}
```

I get errors like this:
error TS1008: Unexpected token; 'module, class, interface, enum, import or statement' expected.
