Solvedangular cli Angular 5: NPM Link - model/index.ts is not part of the compilation.

Bug Report or Feature Request (mark with an x)

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- [ ] feature request


Angular CLI: 1.5.0
Node: 8.7.0
OS: darwin x64
Angular: 5.0.0

Repro steps.

We have a the following folder structure in a git mono-repo

/api (Express Node App)
/model (NPM package using NPM Link, contains mostly typescript interfaces)
/web (Angular)

When using Angular 4.46 and Angular CLI 1.5.rc2 and we were able to make reference to the interfaces defined in the model folder using npm link and using the following example
import { entity } @app/model

We use ng serve to start the app.

After upgrading Angular to V5 and Angular CLI to 1.5.0 we now get the following error -

The log given by the failure.

Module build failed: Error: /Users/thaoula/Projects/platform/model/index.ts is not part of the compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.

The occurs for JIT and AOT builds.
Running TSC does not result in in errors.

Desired functionality.

Would like be able to build the app using Angular 5


30 Answers

✔️Accepted Answer

Hey all, this is a side effect of the stricter tsconfig as described in

The tsconfig file is what determines what TS files are compiled. The error you are getting means that the files mentioned are NOT being compiled.

Before we used to compile all files, essentially ignoring what tsconfig listed. This was a bug, because if you don't include a file in the compilation then it should not be compiled.

By default ./src/ will only pick up files inside src/. If you have a file outside source, it won't be picked up. But you can add more files to the tsconfig via either files or include.

So for @thaoula's case, you probably want to add this the files in ../models to your and also to your tsconfig.spec.json:

  "extends": "../tsconfig.json",
  "compilerOptions": {
    // ...
  "include": [
  "exclude": [
    // ...

You can read more about tsconfig files in

@rolaveric's case is slightly different. You have TS files in your node_modules. This really goes against how libraries should be packaged: libraries should never ship their source .ts files.

The reason for this rule is that the TypeScript version your app isn't necessarily the same as the TS version your library uses. Different versions of TS can produce different output, and give different errors for the same input. They don't even support the same language features. So packaging libraries with TS sources will always break someone's project.

So we don't really support using incorrectly packaged libraries with TS sources. It's something you do at your risk.

That being said, maybe you can try adding it to the include array. But I can't guarantee that will work in the future because it's still an incorrectly packaged library.

Regarding AOT: as far as I can tell, AOT is still incorrectly compiling TS that is not included in the tsconfig. I'll bring this up with the compiler team. (Edit: reported as angular/angular#20115)

Other Answers:

I can report a similar issue.
Key differences:

  1. I'm not using npm link, I've just installed another git repo via npm with typescript source (ie. original .ts files).
  2. The error I'm getting is: node_modules/other-repo/src/lib/index.ts is not part of the compilation output. Please check the other error messages for details.

Was previously working fine with Angular 4.4.6 and Angular CLI 1.4.7

I'll try to create a minimal repo to reproduce the issue once I get home.

I was having the same issue after updating. Like some other people, the ts files were all part of the standard CLI structure tree. Turned out it was a case sensitivity issue for me. I had accidentally written something like...

import { Comment } from './Comment' while in other components import { Comment } from './comment'. Running a normal build would throw me a helpful warning before erroring out, but building for prod only showed me the "Please make sure it is in your tsconfig via the 'files' or 'include' property" error. Fixed the casing issue and prod builds for me fine.

I have this issue....this issue sucks :(

this is how I solved it for local development:

I don't know if people are still having this problem - here's how I fixed the issue.

I have 2 tsconfig.json files, one at the root of the app, and the other inside the src folder (one level down from the root) named that extends the main tsconfig.json. I explicitly added the package that I needed that wasn't being transpiled by Typescript in the "include" array, and like a lot of people here I was getting the *.spec.ts files included despite having them in "exclude" option, so I removed it from the tsconfig.json. The fix was adding the "exclude" option to the second (extended) file. Doing that fixes the Typescript errors and lets me run ng serve without issue.

Here is tsconfig.json:

"compileOnSave": false,
"compilerOptions": {
"baseUrl": "./src",
"outDir": "./dist",
"sourceMap": true,
"declaration": false,
"moduleResolution": "node",
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"target": "es5",
"typeRoots": [
"lib": [
"include": [


"extends": "../tsconfig.json",
"compilerOptions": {
"outDir": "../dist",
"baseUrl": "./",
"module": "es2015",
"types": []
"exclude": [

For some reason adding the exclude in the extended tsconfig ( file is the only way I was able to get it to not complain about the spec files.

Based on the comments from @filipesilva this may still be a bug but it worked for me. Hopefully this helps anyone facing the same issue.

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