{
  description = "repo-rs";

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

  outputs =
    { self, nixpkgs }:
    let
      systems = [
        "aarch64-darwin"
        "aarch64-linux"
        "x86_64-darwin"
        "x86_64-linux"
      ];
      eachSystem =
        f:
        nixpkgs.lib.genAttrs systems (
          system:
          f rec {
            inherit system;
            pkgs = nixpkgs.legacyPackages.${system};
          }
        );
    in
    {
      devShells = eachSystem (
        { pkgs, ... }:
        {
          default = import ./shell.nix { inherit pkgs; };
        }
      );
      packages = eachSystem (
        { pkgs, system, ... }:
        {
          repo-rs = pkgs.callPackage ./. { };
          default = self.packages.${system}.repo-rs;
        }
      );
    };
}