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

The error message "Could not build wheels for Horovod, which is required to install pyproject.toml-based projects" usually means that there was an issue building the Horovod package during installation.

There are several potential causes for this issue, such as missing dependencies or compatibility issues with your system. Here are a few troubleshooting steps you can try:

1. Ensure that you have all the necessary dependencies installed for building Horovod. You can find the list of dependencies in the Horovod documentation.

2. Check that your system meets the minimum requirements for Horovod. For example, Horovod requires a certain version of MPI to be installed.

3. Try installing Horovod using a different installation method, such as pip or conda.

4. If none of the above steps work, you can try building Horovod from source. This can be a more involved process, but it gives you more control over the build process.

I hope this helps! Let me know if you have any further questions.