Make poetry respect trusted-host

[okelet]

Hi all, my company has a proxy that seems to replace certificates from the sites. I make pip work using this configuration in pip.conf:

[global]
trusted-host = pypi.python.org
    pypi.org
    files.pythonhosted.org
    raw.githubusercontent.com
    github.com
proxy = http://the.proxy:8080

This works when using pip directly (for example, python3 -m pip install markupsafe), but poetry seems not to respect this configuration, failing with this message:

$ poetry install
The currently activated Python version 3.6.9 is not supported by the project (^3.9).
Trying to find and use a compatible version. 
Using python3.9 (3.9.4)
Installing dependencies from lock file
Warning: The lock file is not up to date with the latest changes in pyproject.toml. You may be getting outdated dependencies. Run update to update them.

Package operations: 38 installs, 0 updates, 0 removals

  • Installing markupsafe (1.1.1): Failed

  SSLError

  HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /pypi/markupsafe/1.1.1/json (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)'),))

  at ~/.poetry/lib/poetry/_vendor/py3.6/requests/adapters.py:514 in send
      510│                 raise ProxyError(e, request=request)
      511│ 
      512│             if isinstance(e.reason, _SSLError):
      513│                 # This branch is for urllib3 v1.22 and later.
    → 514│                 raise SSLError(e, request=request)
      515│ 
      516│             raise ConnectionError(e, request=request)
      517│ 
      518│         except ClosedPoolError as e:

Is there something I am doing wrong?