The electron-cash program fails to start and prints the following error:

--8<---------------cut here---------------start------------->8---
Traceback (most recent call last):
  File "/gnu/store/34h2k23x2yzm8gycbxkjmq7aqnlzmi7x-electron-cash-4.2.4/bin/.electron-cash-real", line 96, in <module>
    from electroncash import bitcoin, util
  File "/gnu/store/34h2k23x2yzm8gycbxkjmq7aqnlzmi7x-electron-cash-4.2.4/lib/python3.8/site-packages/electroncash/__init__.py", line 5, in <module>
    from .network import Network, pick_random_server
  File "/gnu/store/34h2k23x2yzm8gycbxkjmq7aqnlzmi7x-electron-cash-4.2.4/lib/python3.8/site-packages/electroncash/network.py", line 45, in <module>
    from .interface import Connection, Interface
  File "/gnu/store/34h2k23x2yzm8gycbxkjmq7aqnlzmi7x-electron-cash-4.2.4/lib/python3.8/site-packages/electroncash/interface.py", line 38, in <module>
    from pathvalidate import sanitize_filename
ModuleNotFoundError: No module named 'pathvalidate'
--8<---------------cut here---------------end--------------->8---

This is with Guix at commit 14392c77896561c5846c0f3a0588720792d61e95.