For using PyPy the pandas requirement is

• setup.py

  nfstream/setup.py

  Line 32 in a4180aa

  if (

if (
    platform.python_implementation() == "PyPy"
):  # This is mandatory to fix pandas issues with PyPy
    INSTALL_REQUIRES.append("pandas<=1.2.5")
else:
    INSTALL_REQUIRES.append("pandas>=1.1.5")
    

Same requirement in

• requirements.txt

  nfstream/requirements.txt

  Line 5 in a4180aa

  pandas<=1.2.5; platform.python_implementation == 'PyPy'

• dev_requirements.txt

  nfstream/dev_requirements.txt

  Line 5 in a4180aa

  pandas<=1.2.5; platform.python_implementation == 'PyPy'

This seems to be outdated or?
With this pandas requirement, it does not build on Ubuntu 22.04.
It is building, if I change the requirement to
pandas>=1.2.5