{
  description = "New Modular flake!";
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    # nixpkgs.url = "github:NixOS/nixpkgs/master";
    nixpkgs-stable.url = "nixpkgs/nixos-23.11";

    home-manager.url = "github:nix-community/home-manager/master";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    darwin = {
      url = "github:lnl7/nix-darwin/master";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    hosts = {
      url = "github:StevenBlack/hosts";
      #flake = false;
    };

    hyprland.url = "github:hyprwm/Hyprland";
    hyprland-plugins = {
      url = "github:hyprwm/hyprland-plugins";
      inputs.hyprland.follows = "hyprland";
      #flake = false;
    };

    zig.url = "github:mitchellh/zig-overlay";
    zls.url = "github:zigtools/zls?rev=a26718049a8657d4da04c331aeced1697bc7652b";

    moonlight = {
      url = "github:moonlight-mod/moonlight"; # Add `/develop` to the flake URL to use nightly.
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nixos-cosmic = {
      url = "github:lilyinstarlight/nixos-cosmic";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nh = {
      url = "github:viperML/nh";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-options-search = {
      url = "github:madsbv/nix-options-search";
    };

    nix-index-database.url = "github:nix-community/nix-index-database";
    nix-index-database.inputs.nixpkgs.follows = "nixpkgs";

    chinese-fonts-overlay = {
      url = "github:brsvh/chinese-fonts-overlay/main";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs = inputs @ {
    nixpkgs,
    nixos-cosmic,
    nix-index-database,
    darwin,
    ...
  }: let
    overlays = [
      inputs.zig.overlays.default
      inputs.rust-overlay.overlays.default
      inputs.chinese-fonts-overlay.overlays.default
      inputs.nh.overlays.default
    ];
    inherit (nixpkgs) lib;
    mkIfElse = p: yes: no:
      lib.mkMerge [
        (lib.mkIf p yes)
        (lib.mkIf (!p) no)
      ];

    user = "nmarks";

    shared_modules = [
      # {nixpkgs.overlays = overlays;}
      # {programs.nix-index-database.comma.enable = true;}
      # nixindex
      # homemanagerModules
      {
        _module.args = {
          inherit user;
          inherit mkIfElse;
        };
      }
    ];
  in {
    nixosConfigurations = {
      nixos = lib.nixosSystem {
        system = "x86_64-linux";
        modules =
          [
            ./hosts/desktop/configuration.nix
            nixos-cosmic.nixosModules.default
          ]
          ++ shared_modules;
        specialArgs = inputs;
      };
    };
    darwinConfigurations = {
      "Natalies-MacBook-Air" = darwin.lib.darwinSystem {
        system = "aarch64-darwin";
        specialArgs = inputs;
        modules =
          [
            ./hosts/laptop/configuration.nix
          ]
          ++ shared_modules;
      };
    };
  };
}