Pyinstaller: How to include resources from package used by importlib_resources

I have following project structure:

package1/
  __init__.py
  some.py
  package2
    __init__.py
    some.py
    static_data/
      __init__.py
      file1.txt
      file2.txt
      ...
my_script.py

my_script.py contains imports from all over the structure. And python code wotks fine except of importlib_resources usage.

I access files with importlib_resources (Python 3.6) like so: importlib_resources.open_text(static_data, 'file1.txt').readlines()

Building executable with: pyinstaller my_script.py -F --noconsole --noupx

In result executable I get following error:

File "lib\site-packages\importlib_resources\_py3.py", line 62, in open_text
File "lib\site-packages\importlib_resources\_py3.py", line 52, in open_binary
FileNotFoundError: 'file1.txt' resource not found in 'package1.package2.static_data'

What is the correct way to include resources used with importlib_resources?

from Pyinstaller: How to include resources from package used by importlib_resources