Version "0.1-67-g2a5591f" does not conform to PEP standard

[ivastar]

It works but with some complaining.

Stored in directory: /private/var/folders/hv/3h478c1n4mj5d4ktzyh_v_sh3cf0hx/T/pip-ephem-wheel-cache-5ujkz47o/wheels/61/3d/19/fa504ac5f1784f2711d41468ff36bb04ba06fd8df713bb0785
  WARNING: Built wheel for golfir is invalid: Metadata 1.2 mandates PEP 440 version, but '0.1-67-g2a5591f' is not
Failed to build golfir
Installing collected packages: golfir
  Running setup.py install for golfir ... done
  DEPRECATION: golfir was installed using the legacy 'setup.py install' method, because a wheel could not be built for it. A possible replacement is to fix the wheel build issue reported above. Discussion can be found at https://github.com/pypa/pip/issues/8368
Successfully installed golfir-0.1-67-g2a5591f