{
  description = "Alqages, packages from alqueva to here.";

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

  outputs = inputs@{ self, nixpkgs, }:
    let
      inherit (nixpkgs) lib;
      eachSystem = f:
        nixpkgs.lib.genAttrs [ "x86_64-linux" "aarch64-linux" ] (system:
          f {
            inherit system;
            pkgs = nixpkgs.legacyPackages.${system};
          });
    in {
      overlays.default = _: prev:
        lib.pipe (builtins.readDir ./packages) [
          (lib.filterAttrs (_: v: v == "directory"))
          (lib.concatMapAttrs (name: _: {
            ${name} = prev.callPackage ./packages/${name} { inherit inputs; };
          }))
        ];

      packages = eachSystem ({ pkgs, ... }: self.overlays.default pkgs pkgs);
      devShells = eachSystem ({ pkgs, ... }: {
        default = pkgs.mkShell {
          name = "alqages-dev";
          packages =
            builtins.attrValues { inherit (pkgs) nil nixfmt deadnix statix; };
        };
      });
      formatter = eachSystem ({ pkgs, ... }: pkgs.nixfmt);
    };
}