{
  description = "Ray's Nix Config";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    disko.url = "github:nix-community/disko";
    disko.inputs.nixpkgs.follows = "nixpkgs";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    zen-browser.url = "github:0xc000022070/zen-browser-flake";
    zen-browser.inputs.nixpkgs.follows = "nixpkgs";
    ghostty.url = "github:ghostty-org/ghostty";
    nix-index-database.url = "github:nix-community/nix-index-database";
    nix-index-database.inputs.nixpkgs.follows = "nixpkgs";
    treefmt-nix.url = "github:numtide/treefmt-nix";
    treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
    git-hooks.url = "github:cachix/git-hooks.nix";
    git-hooks.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = {
    self,
    nixpkgs,
    home-manager,
    treefmt-nix,
    ...
  } @ inputs: let
    inherit (self) outputs;
    system = "x86_64-linux";
    dots = "/home/rayandrew/dotfiles";
    user = "rayandrew";
    pkgs = import inputs.nixpkgs {
      inherit system;
      config.allowUnfree = true;
    };
    lib = nixpkgs.lib;
    createCommonArgs = system: {
      inherit
          self
          inputs
          nixpkgs
          lib
          pkgs
          system
          dots
          ;
      specialArgs = {
        inherit self inputs;
      };
    };
    commonArgs = createCommonArgs system;

    # call with forAllSystems (commonArgs: function body)
    forAllSystems =
      fn:
      lib.genAttrs [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ] (system: fn (createCommonArgs system));
    treefmtEval = forAllSystems (
      { pkgs, ... }:
      treefmt-nix.lib.evalModule pkgs {
        projectRootFile = "flake.nix";
        programs.nixfmt-rfc-style.enable = true;
        settings.global.excludes = [ "flake.lock" ];
      }
    );
  in (import ./hosts commonArgs) // 
  { 
    checks = forAllSystems (
      {
        pkgs,
        system,
        ...
      }:
      {
        formatting = treefmtEval.${system}.config.build.check self;
        pre-commit-check = inputs.git-hooks.lib.${system}.run {
          src = ./.;
          excludes = [ "flake.lock" ];
          hooks = {
            treefmt = {
              enable = true;
              package = lib.mkForce treefmtEval.${system}.config.build.wrapper;
              args = [
                # "--config-file ${treefmtEval.${system}.config.build.configFile}"
              ];
            };
          };
        };
      }
    );

    devShells = forAllSystems (
      {
        pkgs,
        system,
        ...
      }:
      {
        default = pkgs.mkShell {
          inherit (self.checks.${system}.pre-commit-check) shellHook;

          name = "dotfiles";
          buildInputs = self.checks.${system}.pre-commit-check.enabledPackages;
          nativeBuildInputs = [
            treefmtEval.${system}.config.build.wrapper
          ];
          packages = with pkgs; [
            sops
            age
            ssh-to-age
            nixfmt-rfc-style
          ];
          DIRENV_LOG_FORMAT = "";
        };
      }
    );

    formatter = forAllSystems ({ system, ... }: treefmtEval.${system}.config.build.wrapper);

  };
}