How to downgrade Flutter SDK (Dart 1.x)

Question

I upgraded my Flutter SDK and now my project is broken. I need to basically revert back to a Flutter SDK which uses Dart 1.x.

I tried the following in the pubspec.ya

Answer 1

In the Flutter install directory execute

git checkout v0.1.9

then run

flutter doctor

You can check which versions are available in the Flutter GitHub repository https://github.com/flutter/flutter

There is an open feature request to make this easier https://github.com/flutter/flutter/issues/14230