ng new missing @angular-devkit

[sysmat]

Command

new

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

• by docs: https://angular.dev/tools/libraries/creating-libraries

ng new my-workspace --no-create-application
cd my-workspace
ng generate library my-lib

• angular.json

"test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "tsConfig": "projects/my-lib/tsconfig.spec.json",
            "polyfills": [
              "zone.js",
              "zone.js/testing"
            ],
            "karmaConfig": "projects/my-lib/karma.conf.js"
          }
        }

• run test npm run test error

Error: Could not find the '@angular-devkit/build-angular:karma' builder's node package.

Minimal Reproduction

• by docs: https://angular.dev/tools/libraries/creating-libraries

Exception or Error

Error: Could not find the '@angular-devkit/build-angular:karma' builder's node package.

Your Environment

Angular: 19.1.3
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.1901.4
@angular-devkit/core         19.1.4
@angular-devkit/schematics   19.1.4
@angular/build               19.1.4
@angular/cli                 19.1.4
@schematics/angular          19.1.4
ng-packagr                   19.1.1
rxjs                         7.8.1
typescript                   5.7.3
zone.js                      0.15.0

Anything else relevant?

No response