{
  pkgs ? import <nixpkgs> {},
  mkPoetryEnv ? ((builtins.getFlake "github:nix-community/poetry2nix").lib.mkPoetry2Nix {inherit pkgs;}).mkPoetryEnv,
}:
pkgs.mkShellNoCC {
  packages = with pkgs; [
    (mkPoetryEnv {
      projectDir = ./.;
      preferWheels = true;
      editablePackageSources = {nix_background_upgrade = ./src;};
      extraPackages = ps: with ps; [mypy];
    })
    poetry
  ];
}