Codex CLI running virtual environment in python faces NameResolutionError for request get. #6451
Description
What version of Codex is running?
codex-cli 0.56.0
What subscription do you have?
Plus
Which model were you using?
gpt-5-codex
What platform is your computer?
Darwin 24.6.0 arm64 arm
What issue are you seeing?
Codex CLI seems to hit this error when invoking the system's sh tool to run a project's venv python binary.
• Ran /bin/sh -lc '.venv/bin/python -m new_nautilus_trader_migration.main' └ Traceback (most recent call last): File "/Users/myusername/Downloads/myproject/.venv/lib/python3.10/site-packages/urllib3/connection.py", line 198, in _new_conn … +66 lines requests.exceptions.ConnectionError: HTTPSConnectionPool(host='api.massive.com', port=443): Max retries exceeded with url: /v2/aggs/ticker/APPL/range/1/ minute/2025-11-07/2025-11-10?adjusted=true&sort=asc&limit=50000 (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0x11b134430>: Failed to resolve 'api.massive.com' ([Errno 8] nodename nor servname provided, or not known)"))
the python script runs fine when triggering from my IDE's run configuration (Pycharm), or terminal (zsh and sh). But when codex cli tries to test the script, the run always fails with the above error.
What steps can reproduce the bug?
- Create a python project
- Create a virtual env for that project
- install required modules in that virtual env such as
requests - Make a
requests.getcall to a endpoint - Create an AGENTS.md file and instruct codex to never use
pythonwhen running, but to use.venv/bin/pythonto ensure codex uses the right python binary. - Above error is thrown in codex. (non-breaking), codex is unable to self-test and relies on user manual testing.
What is the expected behavior?
No response
Additional information
No response