run debug with --no-sound-null-safety Flutter

I have to start a debug with --no-sound-null safety because I have a pacakage that doesn't support it. I have no problem starting my app from shell but with VScode it rember me to start with no sound safety. This is my launch.json file

{
    // Usare IntelliSense per informazioni sui possibili attributi.
    // Al passaggio del mouse vengono visualizzate le descrizioni degli attributi esistenti.
    // Per altre informazioni, visitare: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "autoscrollpdf",
            "cwd": "autoscrollpdf",
            "request": "launch",
            "type": "dart", 
            "args": [
                "--no-sound-null-safety"
            ]
        },
        {
            "name": "autoscrollpdf (profile mode)",
            "cwd": "autoscrollpdf",
            "request": "launch",
            "type": "dart",
            "flutterMode": "profile"
        },
        {
            "name": "autoscrollpdf (release mode)",
            "cwd": "autoscrollpdf",
            "request": "launch",
            "type": "dart",
            "flutterMode": "release"
        }
    ]
}

and this is my shell output when i launch my application with debug:

Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:chips_choice

For solutions, see https://dart.dev/go/unsound-null-safety
3

FAILURE: Build failed with an exception.

* Where:
Script 'C:\Users\valep\OneDrive\Documenti\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1156

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.