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Flutter Doctor Error: Upstream Repository Unknown Source

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This article provides a solution to the “Upstream repository unknown source is not the same as FLUTTER_GIT_URL” error encountered during Flutter doctor checks on Windows.

Problem Description

The error “Upstream repository unknown source is not the same as FLUTTER_GIT_URL” during a Flutter doctor run indicates a mismatch between the Flutter installation’s Git repository and the expected one. This usually points to an issue with the Flutter installation itself or a corrupted system environment.

Possible Causes and Solutions

  • Incorrect Flutter Installation: The Flutter SDK may have been installed incorrectly, or the installation process may have been interrupted.
    • Solution: Reinstall Flutter from the official website (Flutter.dev) using the recommended installer for your operating system. Ensure the installation completes without any errors.
  • Corrupted Flutter Installation: A corrupted or damaged Flutter installation can lead to issues with the Git repository.
    • Solution: Try uninstalling and then reinstalling Flutter. If the issue persists, delete the Flutter installation directory and then reinstall.
  • Environment Variables Issues: Problems with environment variables can affect the Flutter installation’s ability to locate the necessary resources.
    • Solution:
      1. Verify the Flutter SDK path is correctly set in your system environment variables. Open System Properties, then Advanced System Settings, and finally Environment Variables.
      2. Check if the FLUTTER_GIT_URL environment variable exists and matches the expected repository URL.
      3. Restart your computer after making changes to environment variables to ensure the changes take effect. 
        
		#Example of a Flutter path environment variable setting (add to your system environment variables)

		export FLUTTER_HOME=/path/to/flutter
  • Corrupted Cache: The Flutter SDK cache might be corrupted, leading to incorrect settings.
    • Solution: Delete the Flutter SDK cache. The location of the cache usually depends on how you installed Flutter. Look for folders related to Flutter in your user directories (e.g., .cache, .local, etc.).
  • Incorrect PATH: If the PATH environment variable is not set correctly, Flutter tools may not be found.
    • Solution: Ensure the directory containing Flutter tools (bin) is included in the PATH variable. Follow instructions for your operating system to add this path.
  • Git Issues: Issues with Git installation or configuration could also be a factor.
    • Solution: Verify Git is installed and functioning correctly. If not, download and install the latest version of Git.

Other Potential Errors and Solutions

While the primary focus is on the “Upstream repository” error, other potential errors during the Flutter doctor check can include:

Error Possible Cause Solution
Android SDK Issues Problems with Android SDK installation or configuration. Reinstall Android SDK or update components.
Missing or Incorrect Tools Essential tools (like Chrome or VS Code) are missing or incorrectly configured. Download and install the correct versions of the necessary tools.
Network Connectivity Problems Problems connecting to the internet during the check. Check your internet connection and retry the doctor command.

Troubleshooting Steps

  1. Run flutter doctor -v again to get more detailed information about the issues.
  2. Check for error messages from specific tools/components (Android, Chrome, etc.).
  3. Search online for errors specific to the tools mentioned by Flutter doctor.

If the problem persists after trying these solutions, provide further details about the specific errors you’re seeing, along with your operating system and Flutter installation details, to get more tailored advice.