{
  description = "chexit NixOS configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    helium-browser = {
      url = "github:schembriaiden/helium-browser-nix-flake";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    codex-cli-nix.url = "github:sadjow/codex-cli-nix";
  };

  outputs = { nixpkgs, home-manager, helium-browser, codex-cli-nix, ... }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};
    in
    {
      nixosConfigurations.chexit = nixpkgs.lib.nixosSystem {
        inherit system;
        specialArgs = {
          helium = helium-browser.packages.${system}.helium;
        };
        modules = [
          ./configuration.nix
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.backupFileExtension = "hm-bak";
            home-manager.users.chexit = import ./home.nix;
          }
        ];
      };

      devShells.${system}.default = pkgs.mkShell {
        buildInputs = [
          codex-cli-nix.packages.${system}.default
        ];
      };
    };
}