The legacy-install-failure error with pip install occurs when a Python package cannot be installed in “legacy” mode. This can happen when pip tries to install a package that does not provide a wheel distribution, and the setup.py installation fails for some reason.
Here are a few steps you can take to troubleshoot and potentially fix this error:
Upgrading pip might solve your issue as newer versions of pip have better handling of errors and dependencies:
python -m pip install --upgrade pip
If you are using a specific version of Python, replace a Python with your Python version, like python3 or python3.9.
The package you’re trying to install may require the wheel package.
You can install it with the following:
pip install wheel
Check Python and package compatibility
Ensure the package you are installing is compatible with your Python version. Some packages do not work with specific versions of Python. You can usually find this information in the package documentation.
Install package from source
If you cannot install a package from PyPI, try installing it from the source.
You can typically find the source code on the package’s GitHub page. But first, clone the repository and run the Python setup.py install in the repository directory.
Check for specific errors
The “legacy-install-failure” message is a general error message. There might be specific error messages above this line that can give you more information about what went wrong.
I hope one of these above solutions works for you!