analyzing Kaitai Structs fails on missing 'pkg_ressources' python module

[derVedro]

If your system python is not 3.9 you're pretty screwed on analizing Kaitai Structs:

Python stderr:
Traceback (most recent call last):
  File "/tmp/HobbitsPythonrBHuvX/thescript.py", line 162, in parse_data
    struct_module = importlib.__import__(package_name, fromlist=[class_name])
  File "<frozen importlib._bootstrap>", line 1109, in __import__
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/tmp/hobbits-GGgAzl/png.py", line 3, in <module>
    from pkg_resources import parse_version
ModuleNotFoundError: No module named 'pkg_resources'