{
  nixpkgs,
  supportedSystems ? [
    "x86_64-linux"
    "aarch64-darwin"
  ],
  ...
}:
let
  inherit (nixpkgs.lib) genAttrs;

  forEachSupportedSystem =
    f:
    genAttrs supportedSystems (
      system:
      f {
        inherit system;
        pkgs = pkgsFor system;
      }
    );

  pkgsFor =
    system:
    import nixpkgs {
      inherit system;
      config.allowUnfree = true;
    };

in
nixpkgs.lib
// {
  inherit forEachSupportedSystem pkgsFor;
}