{
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
  outputs =
    { nixpkgs, ... }:
    let
      inherit (nixpkgs) lib;
      systems = [
        "x86_64-linux"
        "aarch64-linux"
      ];
      forAllSystems =
        f:
        lib.genAttrs systems (
          system:
          f {
            inherit system;
            pkgs = nixpkgs.legacyPackages.${system};
          }
        );
    in
    {
      devShells = forAllSystems (
        { pkgs, ... }:
        {
          default = pkgs.callPackage ./flake/shell.nix { };
        }
      );

      formatter = forAllSystems ({ pkgs, ... }: pkgs.callPackage ./flake/formatter.nix { });
    };
}