ng add schematic doesn't work with standalone project

[maxokorokov]

ng add @ng-bootstrap/ng-bootstrap
? Would you like to share pseudonymous usage data about this project with the Angular Team
at Google under Google's Privacy Policy at https://policies.google.com/privacy. For more
details and how to change this setting, see https://angular.io/analytics. No
Global setting: enabled
Local setting: disabled
Effective status: disabled
ℹ Using package manager: yarn
✔ Found compatible package version: @ng-bootstrap/ng-bootstrap@15.0.0.
✔ Package information loaded.

The package @ng-bootstrap/ng-bootstrap@15.0.0 will be installed and executed.
Would you like to proceed? Yes
✔ Packages successfully installed.
UPDATE package.json (1178 bytes)
✔ Packages installed successfully.
Bootstrap call not found

It just patches package.json, installs deps and fails.

Workaround:

Follow the manual installation procedure here → https://ng-bootstrap.github.io/#/getting-started#installation