Ресурсы Pyinstaller.DistributionNotFound 'workalendar'

Question

Я импортировал вместе с другими пакет workalendar в свой python скрипт, и он отлично работает. Я компилирую его с помощью Pyinstaller без ошибок, но при запуске exe-файла появляется предупреждение: pkg_resources.DistributionNotFound: Распределение «рабочий календарь» не найдено и требуется приложению.

Я выполняю это:

C:\Python\Python38\Scripts\pyinstaller.exe --onefile .\main.spec

И когда я запускаю exe-файл, возвращается:

Traceback (most recent call last):
File "main.py", line 6, in <module>
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "c:\python\python38\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 623, in 
exec_module
exec(bytecode, module.__dict__)
File "clases\menu.py", line 7, in <module>
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "c:\python\python38\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 623, in 
exec_module exec(bytecode, module.__dict__)
File "clases\dipole\dipole.py", line 32, in <module>
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "c:\python\python38\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 623, in exec_module exec(bytecode, module.__dict__)
File "site-packages\workalendar\__init__.py", line 5, in <module>
File "site-packages\pkg_resources\__init__.py", line 482, in get_distribution
File "site-packages\pkg_resources\__init__.py", line 358, in get_provider
File "site-packages\pkg_resources\__init__.py", line 901, in require
File "site-packages\pkg_resources\__init__.py", line 787, in resolve
pkg_resources.DistributionNotFound: The 'workalendar' distribution was not found and is required by the application
[5716] Failed to execute script main

My spe c file:

# -*- mode: python ; coding: utf-8 -*-

block_cipher = None


a = Analysis(['main.py'],
         pathex=['C:\\Users\\user\\Downloads\\MyScript',
         'C:\\Python\\Python38\\Lib\\site-packages\\workalendar'],
         binaries=[],
         datas=[],
         hiddenimports=['pkg_resources.py2_warn', 'workalendar-9.0.0.dist-info/*', 'workalendar-9.0.0.dist-info'],
         hookspath=[],
         runtime_hooks=[],
         excludes=[],
         win_no_prefer_redirects=False,
         win_private_assemblies=False,
         cipher=block_cipher,
         noarchive=False)
pyz = PYZ(a.pure, a.zipped_data,
         cipher=block_cipher)
exe = EXE(pyz,
      a.scripts,
      a.binaries,
      a.zipfiles,
      a.datas,
      [],
      name='main',
      debug=False,
      bootloader_ignore_signals=False,
      strip=False,
      upx=True,
      upx_exclude=[],
      runtime_tmpdir=None,
      console=True )

В чем проблема?