Details

• Read the Docs project URL: https://readthedocs.org/projects/hawkmoth/
• Build URL (if applicable): https://readthedocs.org/projects/hawkmoth/builds/21154435/

Expected Result

I'm installing python3-clang using apt, enabling python.system_packages, and expect my Sphinx extension to be able to import the package.

build:
  os: ubuntu-22.04
  tools:
    python: "3.11"
  apt_packages:
    - python3-clang

python:
  install:
    - method: pip
      path: .
  system_packages: true

The build log shows the system package was installed, and --system-site-packages was passed to the virtual environment.

Actual Result

Import fails with ModuleNotFoundError: No module named 'clang'.