{
  description = "collection of uku's modules and packages";

  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"];

    pkgsFor = system: import nixpkgs {inherit system;};
    forEachSystem = lib.genAttrs systems;
  in {
    packages = forEachSystem (
      system: let
        pkgs = pkgsFor system;
        isAvailable = name: drv: lib.meta.availableOn {inherit system;} drv;
        flakePkgs = self.overlays.default {} pkgs;
      in
        lib.filterAttrs isAvailable flakePkgs
    );

    overlays.default = import ./pkgs/all-packages.nix;

    nixosModules = {
      reposilite = import ./modules/reposilite.nix;
      asus-numpad = import ./modules/asus-numpad.nix self;
    };

    formatter = forEachSystem (system: (pkgsFor system).alejandra);
  };
}