{
  description = "A very basic flake";

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

  outputs = { self, nixpkgs }:
    let
      arch = "x86_64";
      system = "${arch}-linux";
      pkgs = import nixpkgs { inherit system; };

      lib = pkgs.lib;

      fs = lib.fileset;

      # Cross Compilation Toolchain
      binutilsStage = import ./derivations/cross_toolchain/binutils.nix { pkgs = pkgs; };
      gccStage1 = import ./derivations/cross_toolchain/gcc.nix { pkgs = pkgs; binutils = binutilsStage; };
      linuxHeadersStage = import ./derivations/cross_toolchain/linuxHeaders.nix { pkgs = pkgs; cc1 = linuxHeadersStage; };
    in
    {
      packages.${system}.crossToolchain = {
        linuxHeaders = linuxHeadersStage;
        gcc = gccStage1;
        binutils = binutilsStage;
      };

      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;

      devShells.x86_64-linux.default = pkgs.mkShell {
        buildInputs = with pkgs; [
          git
          nixfmt-rfc-style
        ];
        shellHook = ''
          echo "Welcome to LucyOS Dev Env"
        '';
      };
    };
}