How I Encounter This Issue
When I tried to upgrade Flutter using
flutter upgrade, I got the following error message instead of the usual upgrade process.Error Message
Unable to upgrade Flutter: The current Flutter branch/channel is not tracking any remote repository. Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error
This usually means that your current Flutter installation is not linked to a proper Git remote, so Flutter can’t fetch updates.
Solution
Here are the steps I used to fix it:
- Clone the official Flutter repository
git clone https://github.com/flutter/flutter.git
- Find the path to Flutter
which flutter
- Copy the path you got after entering this command
- Go to that Flutter directory
cd PASTE_THE_PATH
- Switch to the stable channel
flutter channel stable
- Run the upgrade
flutter upgrade
- Verify your setup
flutter doctor -v
If everything is set up correctly, the error should be fixed and you should see Flutter version has been upgraded.
Additional Information
- This issue often happens if Flutter was installed from a zip archive or copied from another machine, instead of being cloned from Git.
- Using the official Git repo ensures that Flutter can track its remote branch and update without problems.
Reference
flutterdevUpgrade Flutter
Upgrade Flutter
Learn how to upgrade Flutter and switch to another channel.
flutterdev