$ ./codexctl -a 10.11.99.1 -p ~/.ssh/id_rsa_remarkable install 3.11.2.5
Success: Connected to device
Traceback (most recent call last):
File "/tmp/onefile_84283_1770491748_617180/main.py", line 13, in <module>
File "/tmp/onefile_84283_1770491748_617180/codexctl/__init__.py", line 642, in main
File "/tmp/onefile_84283_1770491748_617180/codexctl/__init__.py", line 332, in call_func
SystemError: This version requires the new update engine, please upgrade your device to version 3.11.2.5 first.
I believe this is the line doing this compare.