In CPython we have, ``` >>> import sysconfig >>> sysconfig.get_config_var("SOABI") 'cpython-310-x86_64-linux-gnu' >>> sysconfig.get_config_var("EXT_SUFFIX") '.cpython-310-x86_64-linux-gnu.so' ``` But on PyPy we have, ``` >>>> import sysconfig >>>> sysconfig.get_config_var("SOABI") 'pypy39-pp73' >>>> sysconfig.get_config_var("EXT_SUFFIX") '.pypy39-pp73-x86_64-linux-gnu.so' ``` Note that SOABI in PyPy does not have `-x86_64-linux-gnu` prefix mainly due to legacy reasons AFAIK. Maybe @mattip from PyPy can explain the difference. Fixed in https://gitlab.kitware.com/cmake/cmake/-/merge_requests/7395