I have a tkinter app that utilises the tkcalendar package

import tkinter as tk
from tkcalendar import DateEntry
from datetime import datetime


def main() -> None:
    root = tk.Tk()
    root.title('Test calendar')

    event_date = datetime.now()
    date_picker = DateEntry(root,
                            date_pattern='dd/mm/yyyy',
                            year=event_date.year,
                            month=event_date.month,
                            day=event_date.day)
    date_picker.grid(row=0, column=0)

    root.mainloop()


if __name__ == '__main__':
    main()

It works correctly when I call main.py, but not as a zipapp.

I have install tkcalendar in my build directory

python -m pip install tkcalendar --target build

and built the pyz file

python -m zipapp build --main main:main --output dist/main.pyz

But if I run the pyz file, I get an error

NotADirectoryError: [Errno 20] Not a directory: ‘…/dist/main.pyz/babel/locale-data’

How can I fix this?