6

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)
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4
  • I think that this can solve your problem stackoverflow.com/questions/50333003/… Commented Dec 4, 2018 at 8:28
  • i tried the suggestions in that question Commented Dec 4, 2018 at 8:37
  • Did you try installing the missing dependency ? npm i @angular-devkit/build-angular Commented Dec 4, 2018 at 8:49
  • i got the same error and tried ng update --all Commented Jan 17, 2019 at 19:55

4 Answers 4

Reset to default
3

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

  1. install build-angular with this command:

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

  2. then install build-ng-packagr: 

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

  3. 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.

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2

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/[email protected]
#rm -rf node_modules
#rm package-lock.json
#npm install  @angular/[email protected]
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2 Comments

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.
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: docs.npmjs.com/files/package-lock.json
0

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

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-1

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/[email protected]; 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
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