Vadim Frolov Yep, I changed far prompt to %VIRTUAL_ENV_PROMPT%$p$g. But after calling deactivate.bat, prompt still shows venv name. I had to make modifications to python distribution's deactivate.bat to fix that. Not ideal, but now works.

Thank you, great tips! Came here to get prompt for standard python venv in Far manager. Still couldn't make the prompt, but FarCall and %PROMPT% are great tools to use anyway.