Unable to install Freezed with flutter because freezed depends on freezed?

Question

I want to try the Freezed package with flutter, I follow the setup steps in the package readme and this video.

But when I enter the command to add the freezed package;

flutter pub add --dev freezed

, got the following error message :

Because freezed depends on freezed, version solving failed.
pub finished with exit code 65

I don't understand why freezed depends on freezed !?

If I add freezed in the pubspec.yaml file I go the same error:

Error on line 51, column 3 of pubspec.yaml: A package may not list itself as a dependency.
   ╷
51 │   freezed : any
   │   ^^^^^^^^
   ╵

I use Flutter 3.0.1 with Dart 2.17.1 on Linux 22.04. I found nohting in the Freezed github issues or googeling.

Any idea, suggestions ?

Thank's,

Constant