Could not build wheels for lxml, which is required to install pyproject.toml-based projects

This error typically occurs when trying to install packages that have dependencies on the `lxml` library. The `lxml` library requires some additional system-level dependencies to be installed before it can be built.

To resolve this issue, you can try the following steps:

1. Install the system-level dependencies for `lxml`. On Ubuntu or Debian-based systems, you can use the following command:

   sudo apt-get install libxml2 libxml2-dev libxslt1-dev zlib1g-dev

On macOS, you can use Homebrew to install the dependencies:

   brew install libxml2 libxslt zlib

For other operating systems, please refer to the official documentation for installing `lxml` for your specific platform.

2. Once the system-level dependencies are installed, you can try installing `lxml` again using pip:

   pip install lxml

If you're using a virtual environment, make sure it is activated before running the above command.

If you still encounter issues, please provide more details about your environment and any specific error messages you're seeing, so I can assist you further.