How can I pip install the binary module from pybind11 into a Python environment?

[wigging]

I'm using pybind11 to build a Python module from C++ code. For example, the somecode.cpp file contains a function named square() and pybind11 creates a binary module named somecode.cpython-310-darwin.so. If a script is in the same directory as the binary module, I can import the module in that script using import somecode. Or if I start a REPL session from within the directory, I can also import the module in the REPL session. But if I try to install the module in a Python environment using pip install somecode.cpython-310-darwin.so it gives the following errors:

ERROR: Could not find a version that satisfies the requirement somecode.cpython-310-darwin.so (from versions: none)  
ERROR: No matching distribution found for somecode.cpython-310-darwin.so  

How can I install this binary module created from pybind11 into a Python environment?