{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      nixpkgs,
      flake-utils,
      ...
    }:
    let
      mkPackages = pkgs: {
        madd-client = pkgs.callPackage ./madd-client.nix { };
        madd-server = pkgs.callPackage ./madd-server.nix { };
      };
    in
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
        };
      in
      {
        devShells.default = pkgs.mkShell {
          buildInputs = with pkgs; [
            cargo
            clippy
            rustfmt
            rustc
          ];
        };

        packages = mkPackages pkgs;
      }
    )
    // rec {
      overlays.madd = final: prev: mkPackages final;
      overlays.default = overlays.madd;

      nixosModules.madd = import ./nixos.nix;
      nixosModules.default = nixosModules.madd;
    };
}