{
  description = "A very basic flake";

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

  outputs =
    { self, nixpkgs }:
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs {
        inherit system;
        overlays = [
          (import ./overlay.nix)
        ];
      };
    in
    {
      packages.x86_64-linux.gem5 = pkgs.gem5;
      packages.x86_64-linux.default = self.packages.x86_64-linux.gem5;
    };
}