{
  description = "Rechnernetze";

  inputs = {
    flake-parts.url = "github:hercules-ci/flake-parts";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = inputs @ {flake-parts, ...}:
    flake-parts.lib.mkFlake {inherit inputs;} {
      imports = [];
      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
      perSystem = {
        config,
        self',
        inputs',
        pkgs,
        system,
        ...
      }:
        with pkgs.lib; {
          devShells.default = with pkgs;
            mkShell {
              packages = [
                openjdk
                ant
              ];

              shellHook = ''
                echo "Usage Example:"
                echo "ant run -Dmain-class=praktikum5.aufgabe3.Server"
              '';
            };
        };
      flake = {
      };
    };
}