Flutter Webでflutter_webとflutter_web_ui

以下みたいにflutter_webとflutter_web_uiだけでだめで

dependencies:
  flutter_test:
    sdk: flutter

  flutter_web: any
  flutter_web_ui: any
  uuid: any
  firebase: ^7.0.0
  cloud_firestore: ^0.13.6

こう書くみたい。

dependency_overrides:
  flutter_web:
    git:
      url: https://github.com/flutter/flutter_web
      path: packages/flutter_web
  flutter_web_ui:
    git:
      url: https://github.com/flutter/flutter_web
      path: packages/flutter_web_ui

なにこれ？

flutter pub get
Warning: You are using these overridden dependencies:
! flutter_web 0.0.0 from git https://github.com/flutter/flutter_web at c04fb5 in packages/flutter_web
! flutter_web_ui 0.0.0 from git https://github.com/flutter/flutter_web at c04fb5 in packages/flutter_web_ui
Running "flutter pub get" in admin...                               0.6s