{
    inputs = {
        nixpkgs.url = "github:cachix/devenv-nixpkgs/rolling";
        nixpkgs-python.url = "github:cachix/nixpkgs-python";
        nixpkgs-python.inputs = { nixpkgs.follows = "nixpkgs"; };
        systems.url = "github:nix-systems/default";
        devenv.url = "github:cachix/devenv";
        devenv.inputs.nixpkgs.follows = "nixpkgs";
    };

    nixConfig = {
        extra-trusted-public-keys = [
            "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
            "nixpkgs-python.cachix.org-1:hxjI7pFxTyuTHn2NkvWCrAUcNZLNS3ZAvfYNuYifcEU="
        ];
        extra-substituters = [
            "https://devenv.cachix.org"
            "https://nixpkgs-python.cachix.org"
        ];
    };

    outputs = { self, nixpkgs, devenv, systems, ... } @ inputs:
        let
            forEachSystem = nixpkgs.lib.genAttrs (import systems);
        in
            {
            packages = forEachSystem (system: {
                devenv-up = self.devShells.${system}.default.config.procfileScript;
            });

            devShells = forEachSystem
                (system:
                    let
                        pkgs = nixpkgs.legacyPackages.${system};
                    in
                        {
                        default = devenv.lib.mkShell {
                            inherit inputs pkgs;
                            modules = [
                                {
                                    languages.python = {
                                        enable = true;
                                        version = "3.11.3";
                                        venv.enable = true;
                                        venv.requirements = ./requirements.txt;
                                    };
                                    packages = [ pkgs.zsh pkgs.python311Packages.tkinter ];
                                    processes.run.exec = "python main.py";
                                }
                            ];
                        };
                    });
        };
}