module 'tslib' cannot be found

Hi guys. I’m getting this error when I run `node_modules/.bin/tsc’ in the following folder.

error TS2354: This syntax requires an imported helper but module ‘tslib’ cannot be found.

The offending line (rxjs/Subscriber.d.ts(13,36) does indeed include an innocent looking extend keyword. Can you tell me what I’m doing wrong?

$ node_modules/.bin/tsc
node_modules/rxjs/Subscriber.d.ts(13,36): error TS2354: This syntax requires an imported helper but module 'tslib' cannot be found.

src/main.ts

import { Observable } from "rxjs";

Observable.timer(3000, 5000)
  .timeInterval()
  .subscribe((interval) => console.log(interval));

tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "importHelpers": true,
    "target": "es5",
    "noEmitHelpers": true
  }
}

package.json

{
  "name": "stuff",
  "version": "1.0.0",
  "scripts": {
    "build": "webpack"
  },
  "devDependencies": {
    "@types/core-js": "^0.9.35",
    "ts-loader": "^1.3.2",
    "typescript": "^2.1.4",
    "webpack": "^2.1.0-beta.25"
  },
  "dependencies": {
    "rxjs": "^5.0.1",
    "tslib": "^1.2.0"
  }
}

rxjs/Subscriber.d.ts(13)

export declare class Subscriber<T> extends Subscription implements Observer<T> {

I posted my question to stackoverflow but can’t get any interest

[tony2tones]

try npm install --save tslib, thats what helped me out.

[mhegazy]

We should be publishing 2.1.5 with he fix soon.