tslib not found in node server production build

Prerequisites

Please answer the following questions for yourself before submitting an issue. YOU MAY DELETE THE PREREQUISITES SECTION.

• I am running the latest version
• I checked the documentation (nx.dev) and found no answer
• I checked to make sure that this issue has not already been filed
• I’m reporting the issue to the correct repository (not related to React, Angular or any dependency)

Expected Behavior

I build a production build of my node app, which is generated from @nrwl/node, calling nx build api --prod. I copy the generated files onto my server (or just another directory) and start it with node main.js.

Current Behavior

The error I get when starting is:

> node main.js
internal/modules/cjs/loader.js:800
    throw err;
    ^

Error: Cannot find module 'tslib'
Require stack:
- C:\Users\vinca\Desktop\main.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:797:15)
    at Function.Module._load (internal/modules/cjs/loader.js:690:27)
    at Module.require (internal/modules/cjs/loader.js:852:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\vinca\Desktop\main.js:91:18)
    at __webpack_require__ (C:\Users\vinca\Desktop\main.js:20:30)
    at Object.<anonymous> (C:\Users\vinca\Desktop\main.js:1086:17)
    at __webpack_require__ (C:\Users\vinca\Desktop\main.js:20:30)
    at Object.<anonymous> (C:\Users\vinca\Desktop\main.js:1076:18)
    at __webpack_require__ (C:\Users\vinca\Desktop\main.js:20:30) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ 'C:\\Users\\vinca\\Desktop\\main.js' ]
}

[hertzg]

For people who are trying out nx and ended up here from google.

You probably have set "importHelpers": true (default config) in your tsconfig.base.json which will use tslib package when there’s a need to emit helpers in generated code.

–importHelpers | boolean | false | Import emit helpers (e.g. __extends, __rest, etc…) from tslib

There are reasons when such behavior is Preferred but if you want to opt out of it you could set that flag to false.

References

• https://www.typescriptlang.org/docs/handbook/compiler-options.html
• https://www.npmjs.com/package/tslib

[vincaslt]

I added this flag in production build config: "externalDependencies": "none"