Error with Python 3.11 installed by uv

[trprado-via]

Fedora: 42
uv: 0.8.18

I use uv in a project and run my unit tests in a GitHub or locale action with pre-commit using the standalone version of Python 3.11 from the uv Python build. However, I started getting this error with Python 3.11 this week.

nox -f tests/noxfile.py 
nox > Running session tests-3.11
nox > Creating virtual environment (virtualenv) using python3.11 in .nox/tests-3-11
nox > python -m pip install 'pytest>=8.4.1'
nox > Command python -m pip install 'pytest>=8.4.1' failed with exit code 1:
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Python path configuration:
  PYTHONHOME = (not set)
  PYTHONPATH = (not set)
  program name = '/mnt/DATA/Dev/via/VIA/repositories/datahub/kuantum/kuantum-glue-process-calc/tests/.nox/tests-3-11/bin/python'
  isolated = 0
  environment = 1
  user site = 1
  safe_path = 0
  import site = 1
  is in build tree = 0
  stdlib dir = '/install/lib/python3.11'
  sys._base_executable = '/home/trprado/.local/share/uv/python/cpython-3.11.11-linux-x86_64-gnu/bin/python3.11'
  sys.base_prefix = '/install'
  sys.base_exec_prefix = '/install'
  sys.platlibdir = 'lib'
  sys.executable = '/mnt/DATA/Dev/via/VIA/repositories/datahub/kuantum/kuantum-glue-process-calc/tests/.nox/tests-3-11/bin/python'
  sys.prefix = '/install'
  sys.exec_prefix = '/install'
  sys.path = [
    '/install/lib/python311.zip',
    '/install/lib/python3.11',
    '/install/lib/python3.11/lib-dynload',
  ]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

Current thread 0x00007f96f3b3ec40 (most recent call first):
  <no Python frame>

If I use the command 'uv run', the error does not occur. However, if I use Python 3.11 installed in the path by uv, this error is displayed in the terminal.

I tried using other versions of 3.11 (I use 3.11 because my project is for Glue 5).

uv python ls:

cpython-3.11.12-linux-x86_64-gnu                         /home/trprado/.local/share/uv/python/cpython-3.11.12-linux-x86_64-gnu/bin/python3.11
cpython-3.11.11-linux-x86_64-gnu                         /home/trprado/.local/bin/python3.11 -> /home/trprado/.local/share/uv/python/cpython-3.11.11-linux-x86_64-gnu/bin/python3.11
cpython-3.11.11-linux-x86_64-gnu                         /home/trprado/.local/share/uv/python/cpython-3.11.11-linux-x86_64-gnu/bin/python3.11

[zanieb]

This is a duplicate of #380 and various others, e.g., astral-sh/uv#15334