{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

  outputs =
    { self, nixpkgs }:
    let
      supportedSystems = [
        "x86_64-linux"
        "x86_64-darwin"
        "aarch64-linux"
        "aarch64-darwin"
      ];
      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
      pkgs = forAllSystems (system: nixpkgs.legacyPackages.${system});
    in
    {
      devShells = forAllSystems (
        system:
        let
          python = pkgs.${system}.python3;
          pythonEnv = python.withPackages (
            ps: with ps; [
              flake8
              isort
              mypy
            ]
          );
        in
        {
          default = pkgs.${system}.mkShellNoCC { packages = [ pythonEnv ]; };
        }
      );
    };
}