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

    outputs = { self, nixpkgs }: 
    let
        inherit (nixpkgs) lib;

        systems = [
          "x86_64-linux"
          "aarch64-linux"
          "x86_64-darwin"
          "aarch64-darwin"
        ];

        forAllSystems = f: lib.genAttrs systems (system: let
          pkgs = nixpkgs.legacyPackages.${system};
        in f system pkgs);
    in {
        devShells = forAllSystems (system: pkgs: {
          default = pkgs.mkShell {
            nativeBuildInputs = [
                pkgs.uiua
            ];
          };
        });

        packages = forAllSystems (system: pkgs: {
          default = pkgs.callPackage ./nix/package.nix {};
        });

        overlays.default = final: prev: {
            qotd = self.packages.${prev.system}.default;
        };

        nixosModules.default = ./nix/module.nix;
    };
}