build_runner failed after upgrading my flutter

[casontek]

i am unable to generate my model file after upgrading my flutter and dart sdk

dart --version
Dart SDK version: 3.5.0-103.0.dev (dev) (Thu Apr 25 17:03:06 2024 -0700) on "macos_x64"

flutter --version
Flutter 3.22.0-18.0.pre.30 • channel master • https://github.com/flutter/flutter.git
Framework • revision 5f0628d335 (11 days ago) • 2024-04-26 02:23:26 -0400
Engine • revision d794580077
Tools • Dart 3.5.0 (build 3.5.0-103.0.dev) • DevTools 2.35.0-dev.8

pubspec.yaml

environment:
sdk: '>=3.3.0-273.0.dev <4.0.0'

dev_dependencies:
flutter_test:
sdk: flutter
bloc_test: ^9.1.3
build_runner: ^2.4.9
json_serializable: ^6.7.1

model object

import 'package:json_annotation/json_annotation.dart';

part 'p_user.g.dart';

@JsonSerializable()
class User {
String name;
String phone;
String state;
String country;
String address;

User({
this.name = '',
this.phone = '',
this.country = '',
this.address = ''
});

factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);

Map<String, dynamic> toJson() => _$UserToJson(this);

}

Build Error

[INFO] Precompiling build script... completed, took 147ms
[SEVERE] Failed to precompile build script .dart_tool/build/entrypoint/build.dart.
This is likely caused by a misconfigured builder definition.