{
  description = "kenryuS nixos configurations/dotfiles";

  inputs = {
    nixpkgs.url = "nixpkgs/nixos-24.05";
    home-manager.url = "github:nix-community/home-manager/release-24.05";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
  };

  outputs = inputs@{ nixpkgs, home-manager, ... }:
    let
      systemSettings = {
        system = "x86_64-linux";
        hostname = "kenryu-nixos";
        machine = "workstation";
        timezone = "Asia/Tokyo";
        locale = "ja_JP.UTF-8";
        bootConf = {
          mode = "uefi";
          mountPath = "/boot";
          grubDev = "";
        };
        gpuType = "nvidia";
      };

      userSettings = {
        username = "kenryus";
        name = "Kenryu Shibata";
        email-dev = "kenryudev5894@gmail.com";
        dotfilesDir = "/etc/nixos";
        editor = "nvim";
        editor-pkg = pkgs.neovim;
      };

      pkgs = import inputs.nixpkgs {
        system = systemSettings.system;
        config = {
          allowUnfree = true;
          allowUnfreePredicate = (_: true );
        };
      };

      lib = inputs.nixpkgs.lib;
      home-manager = inputs.home-manager;
    in {
      nixosConfigurations.system = lib.nixosSystem {
        system = systemSettings.system;
        modules = [
          (./. + "/machines" + ("/" + systemSettings.machine) + "/configuration.nix")
          home-manager.nixosModules.home-manager {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.users.${userSettings.username} = import (./. + "/machines" + ("/" + systemSettings.machine) + "/home.nix");
            home-manager.extraSpecialArgs = {
              inherit userSettings;
            };
          }
        ];
        specialArgs = {
          inherit systemSettings;
          inherit userSettings;
          inherit inputs;
        };
      };
    };
}