Is Angular compatible with Yarn's zero installs?

I am running into an error after starting up a new project, which causes me to wonder whether I'm correctly reading the information I got online.

Following instructions from Angular and other sources about using Yarn as the packkage manager, I ran these commands:

npm install -g @angular/cli typescript less less-plugin-clean-css
ng version
ng config -g cli.packageManager yarn
ng new my-app
yarn add @angular/material @angular/cdk
yarn install                            
ng serve

At this point, after confirming that the Angular version was indeed the one I wanted, I thought the app generated by the Angular CLI would simply run. However, I get this error message:

Node packages may not be installed. Try installing with 'yarn install'. Error: Could not find the '@angular-devkit/build-angular:dev-server' builder's node package.

Having already run the suggested command, I went back to the Yarn documentation to double check the meaning of the command.

I am now wondering whether yarn's installation of the packages is compatible with what Angular expects. I am surprised to find very little information about this. Just about every search result speaks of installing packages with npm install. If so, I wonder what's the point of using yarn.

I am clearly missing something to understand how Angular 19 is supposed to work with Yarn. The .angular-config.json file in my home directory has this:

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "cli": {
    "packageManager": "yarn",
    "analytics": false
  },
  "version": 1,
  "projects": {}
}

Solution

After much time spent on this, I've come to understand that Angular simply needs node_modules to be present on the disk. The answer to my title question is No.

Solution: The project creation with ng new ends without a .yarnrc.yml file. This file needs to be created and it needs a line nodeLinker: node-modules so that Yarn knows to persist the required files in the required node_modules directory.

Side note: It's a sad state of affairs that even articles published this very year 2024 still reference either Yarn 1 or deprecated ways of doing things.