Could not find module "@angular-devkit/build-angular" after npm install

Question

After running npm install then npm update I got this error when using ng serve:

Could not find module "@angular-devkit/build-angular" from "C:\\Users\\Matt\\Coding\\chart".
Error: Could not find module "@angular-devkit/build-angular" from "C:\\Users\\Matt\\Coding\\chart".

Then checking the angular version, build-angular is there.

ng version

--

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.11.0 (cli-only)
@angular-devkit/build-angular      <error>
@angular-devkit/build-ng-packagr   <error>
@angular-devkit/core               7.1.0 (cli-only)
@angular-devkit/schematics         7.1.0 (cli-only)
@schematics/angular                7.1.0 (cli-only)
@schematics/update                 0.11.0 (cli-only)
ng-packagr                         <error>
rxjs                               6.3.3 (cli-only)
typescript                         3.1.6 (cli-only)

I think that this can solve your problem https://stackoverflow.com/questions/50333003/could-not-find-module-angular-devkit-build-angular — manelseo, Dec 04 '18 at 08:28
Did you try installing the missing dependency ? npm i @angular-devkit/build-angular — manelseo, Dec 04 '18 at 08:49

score 3 · Answer 1 · answered Mar 15 '20 at 11:19

I have the same error. I fixed with follow commands:

install build-angular with this command:

  `npm i --save-dev @angular-devkit/build-angular`

then install build-ng-packagr:

  `npm i --save-dev @angular-devkit/build-ng-packagr`

finally install ng-packagr:
```
  `npm i --save-dev ng-packagr`
```

note: the version of installed package will be related with angular version.

I hope is useful.

tocode · Answer 2 · 2019-01-27T09:49:00.357

1

What worked for me was uninstall my @angular/cli , then removed node_modules directory and package-lock.json file, then reinstall @angular/cli. Example:

#npm uninstall  @angular/cli@7.1.3
#rm -rf node_modules
#rm package-lock.json
#npm install  @angular/cli@7.1.3

edited Jan 27 '19 at 09:49

answered Jan 27 '19 at 09:31

tocode

115
1
10

Would you lilke to improve this answer by adding more explanation and maybe some details on "How?". Think of the beginners who might want to use your advice. – Yunnosch Jan 27 '19 at 09:34
1

`package-lock.json` is automatically generated for any operations where npm modifies either the `node_modules` tree, or `package.json`. It describes the exact tree that was generated, such that subsequent installs are able to generate identical trees, regardless of intermediate dependency updates. Source: https://docs.npmjs.com/files/package-lock.json – karel Jan 27 '19 at 09:36

score 0 · Answer 3 · answered May 02 '19 at 18:27

0

Try this npm install --save-dev @angular-devkit/build-angular

answered May 02 '19 at 18:27

Sabita Nadar

19
1

score -1 · Answer 4 · answered May 05 '19 at 08:53

Haven't you seen these two lines?

@angular-devkit/build-angular      <error>
@angular-devkit/build-ng-packagr   <error>

I encountered similar issues today and solved by npm uninstall @angular/cli@7.3.8; just that, nothing more and then I can run ng build --prod --stats-json as expected.

Before uninstallation, there is the error similar to yours but mine is @angular-devkit/build-ng-packagr.

$ ng build --stats-json
Could not find module "@angular-devkit/build-ng-packagr" from "/home/hearen/git/repos/ng-hue-lib".
Error: Could not find module "@angular-devkit/build-ng-packagr" from "/home/hearen/git/repos/ng-hue-lib".
    at Object.resolve (/home/hearen/git/repos/ng-hue-lib/node_modules/@angular-devkit/core/node/resolve.js:141:11)
    at Observable.rxjs_1.Observable [as _subscribe] (/home/hearen/git/repos/ng-hue-lib/node_modules/@angular-devkit/architect/src/architect-legacy.js:153:40)
    at Observable._trySubscribe (/home/hearen/git/repos/ng-hue-lib/node_modules/@angular-devkit/architect/node_modules/rxjs/internal/Observable.js:44:25)
    at Observable.subscribe (/home/hearen/git/repos/ng-hue-lib/node_modules/@angular-devkit/architect/node_modules/rxjs/internal/Observable.js:30:22)
    at /home/hearen/git/repos/ng-hue-lib/node_modules/@angular-devkit/architect/node_modules/rxjs/internal/Observable.js:99:19
    at new Promise (<anonymous>)
    at Observable.toPromise (/home/hearen/git/repos/ng-hue-lib/node_modules/@angular-devkit/architect/node_modules/rxjs/internal/Observable.js:97:16)
    at BuildCommand.initialize (/home/hearen/git/repos/ng-hue-lib/node_modules/@angular/cli/models/architect-command.js:67:96)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:745:11)
    at startup (internal/bootstrap/node.js:279:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:696:3)

...

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.13.8
@angular-devkit/build-angular      0.13.8
@angular-devkit/build-ng-packagr   <error>
@angular-devkit/build-optimizer    0.13.8
@angular-devkit/build-webpack      0.13.8
@angular-devkit/core               7.3.8
@angular-devkit/schematics         7.3.8
@angular/cdk                       7.3.7
@angular/cli                       7.3.8
@ngtools/json-schema               1.1.0
@ngtools/webpack                   7.3.8
@schematics/angular                7.3.8
@schematics/update                 0.13.8
ng-packagr                         5.0.1
rxjs                               6.4.0
typescript                         3.1.6
webpack                            4.29.0

Could not find module "@angular-devkit/build-angular" after npm install

4 Answers4