Example composer.json is not correct

In the example composer.json file there are some extra packages listed. For example:

          {
            "type": "package",
            "package": {
                "name": "desandro/masonry",
                "version": "3.3.1",
                "type": "drupal-library",
                "dist": {
                    "url": "https://github.com/desandro/masonry/archive/v3.3.1.zip",
                    "type": "zip"
                }
            }
        },

The problem here is that the package "desandro/masonry" is listed on https://packagist.org/packages/desandro/masonry and therefore if you run composer install, composer will get the package from packagist.org and install it in the vendor directory.
My solution is to rename the package name in composer.json to for example "lib-desandro/masonry".