{ pkgs ? import <nixpkgs> { } }:

let
  my-python = pkgs.python312;
  python-with-my-packages = my-python.withPackages
    (p: with p; [
      # flask
    ]);
  lib-path = with pkgs; lib.makeLibraryPath [
  ];
in pkgs.mkShell {
  buildInputs = [
    python-with-my-packages
  ];
shellHook = ''
    SOURCE_DATE_EPOCH=$(date +%s)
    export "LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${lib-path}"
    VENV=.venv

    if test ! -d $VENV; then
      python3 -m venv $VENV
    fi
    source ./$VENV/bin/activate
    export PYTHONPATH=`pwd`/$VENV/${python-with-my-packages.sitePackages}/
    # export PYTHONPATH=`pwd`/$VENV/${python-with-my-packages.sitePackages}/:$PYTHONPATH
    pip install -r requirements.txt
  '';

  postShellHook = ''
    ln -sf ${python-with-my-packages.sitePackages}/* ./.venv/lib/python3.12/site-packages
  '';
}