[Python] future module in debian

I want to use this app. As it is mentioned in the README.md it needs the future module of python. I have debian sid and python3-future is removed from the repos of apt. When I install it via its setup.py file according to the README.md file, no error occurres, but when I call alienfx-gtk in terminal I get error below:

Traceback (most recent call last):
File "/usr/local/bin/alienfx-gtk", line 33, in <module>
sys.exit(load_entry_point('alienfx==2.4.3', 'gui_scripts', 'alienfx-gtk')())
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/bin/alienfx-gtk", line 25, in importlib_load_entry_point
return next(matches).load()
~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/importlib/metadata/__init__.py", line 179, in load
module = import_module(match.group('module'))
File "/usr/lib/python3.13/importlib/__init__.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 1027, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "/usr/local/lib/python3.13/dist-packages/alienfx-2.4.3-py3.13.egg/alienfx/ui/gtkui/__init__.py", line 2, in <module>
from alienfx.ui.gtkui.gtkui import start
File "/usr/local/lib/python3.13/dist-packages/alienfx-2.4.3-py3.13.egg/alienfx/ui/gtkui/gtkui.py", line 46, in <module>
from alienfx.ui.gtkui.action_renderer import AlienFXActionCellRenderer
File "/usr/local/lib/python3.13/dist-packages/alienfx-2.4.3-py3.13.egg/alienfx/ui/gtkui/action_renderer.py", line 35, in <module>
from past.utils import old_div
ModuleNotFoundError: No module named 'past'


I can't install the module via pip because it should be installed system-wide. How can I solve the problem?

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