~$ flutter clean; flutter pub get;
Cleaning Xcode workspace... 1,346ms
Resolving dependencies... (1.4s)
Because build_runner >=2.0.0 depends on web_socket_channel ^2.0.0 and gris_app_flutter depends on web_socket_channel ^3.0.0, build_runner >=2.0.0 is forbidden.
So, because gris_app_flutter depends on build_runner ^2.4.9, version solving failed.
You can try the following suggestion to make the pubspec resolve:
* Consider downgrading your constraint on web_socket_channel: flutter pub add web_socket_channel:^2.4.5
When I run:
environment: sdk: ">=3.3.4 <4.0.0" flutter: "3.19.6"
dependencies: ... web_socket_channel: ^3.0.0
dev_dependencies: ... build_runner: ^2.4.9