When a build is to be made, copy the short hash of last commit and update it in src/__version__.py. After that make commit and push the version bump.
After that you can now create the build with the command below
python -m PyInstaller .\MangaManager.spec --clean
If you can not run the build make sure all requirements are installed. Pyinstaller does not use the virtual env requirements. So make sure the base python has them installed Some of the requirements that gave me issues are:
chardet