PyInstaller打包Windows服务时遇'urllib3.packages.six.moves'模块缺失错误

• 用PyInstaller将脚本打包为Windows服务，运行时触发上述错误
• 虚拟环境中执行的打包命令：pyinstaller.exe --onefile --runtime-tmpdir=. --hidden-import win32timezone --hidden-import urllib3 laps_service.py，已添加urllib3作为隐式导入但无效
• 已尝试卸载重装urllib3和requests：因servicemanager依赖要求安装了requests==2.24.0，pip自动替换为兼容的urllib3-1.25.11，且已安装six，但问题未解决
• 此前该脚本在虚拟环境中打包为普通exe可正常运行，推测是包版本问题，但pip check未检测到依赖损坏
• 手头有旧版可正常运行的exe，若能查看其中的包版本或许有助于定位问题

完整报错栈：

PS C:\LAPS> .\laps_service.exe --startup delayed install
Traceback (most recent call last):
  File "laps_service.py", line 29, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 419, in exec_module
  File "requests\__init__.py", line 43, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 419, in exec_module
  File "urllib3\__init__.py", line 7, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 419, in exec_module
  File "urllib3\connectionpool.py", line 11, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 419, in exec_module
  File "urllib3\exceptions.py", line 2, in <module>
ModuleNotFoundError: No module named 'urllib3.packages.six.moves'
[14276] Failed to execute script 'laps_service' due to unhandled exception!

内容的提问来源于stack exchange，提问作者Mike Saunders