Install commands from https://py-free-threading.github.io/installing_cpython/ :

  sudo dnf install python3.13-freethreading

  sudo add-apt-repository ppa:deadsnakes
  sudo apt-get update
  sudo apt-get install python3.13-nogil

  conda create -n nogil -c defaults -c ad-testing/label/py313_nogil python=3.13

  mamba create -n nogil -c defaults -c ad-testing/label/py313_nogil python=3.13

TODO: conda-forge ?, pixi