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

  outputs = {self, nixpkgs, ...}: let
    inherit (nixpkgs) lib;
    systems = ["x86_64-linux" "aarch64-linux"];
    forAllSystems = f: lib.genAttrs systems (
      system: f system (import nixpkgs {
        inherit system;
      })
    );
  in {
    packages = forAllSystems (system: pkgs: {
      REPLACE_ME = pkgs.callPackage ./flake/package.nix {};
      default = self.packages.${system}.REPLACE_ME;
    });

    devShells = forAllSystems (_: pkgs: {
      default = pkgs.callPackage ./flake/shell.nix {};
    });

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