{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    mypkgs = {
      url = "git+https://git.sys-con.ru/thek0tyara/nixpkgs-extension.git";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    ragenix.url = "github:yaxitech/ragenix/2025.03.09";
    niri.url = "github:YaLTeR/niri/v25.11";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    ghostty.url = "github:ghostty-org/ghostty/tip";
    # ghostty.url = [
    #   "github:ghostty-org/ghostty/1.3.0"
    #   "github:ghostty-org/ghostty/tip"
    # ];
    dw-proton.url = "github:imaviso/dwproton-flake";
    intel-hw.url = "github:MordragT/nixos";
    #
  };
  outputs =
    inputs@{
      # self,
      nixpkgs,
      mypkgs,
      ragenix,
      home-manager,
      ghostty,
      intel-hw,
      ...
    }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};
    in
    {
      devShells.${system}.default = pkgs.mkShell {
        packages = [
          ragenix.packages.x86_64-linux.default
        ];
      };
      nixosConfigurations.testenv = nixpkgs.lib.nixosSystem {
        inherit system;
        #
        specialArgs = { inherit inputs; };
        modules = [
          ragenix.nixosModules.default
          (
            {
              pkgs,
              pkgdefault,
              ...
            }:
            {
              _module.args = {
                pkgdefault = pkg: pkg.packages.${pkgs.stdenv.hostPlatform.system}.default;
              };
              nixpkgs.overlays = [
                intel-hw.overlays.default
                # (import ./custom/overlays/default.nix)
                mypkgs.overlays.default
                (import ./custom/override.nix)
              ];
              # boot.kernelPatches = [
              #   {
              #     name = "name";
              #     patch = null;
              #     extraConfig = "";
              #   }
              # ];

              hardware = {
                graphics = {
                  enable = true;
                  extraPackages = (
                    with pkgs;
                    [
                      intel-media-driver
                      intel-ocl
                      vpl-gpu-rt
                      intel-compute-runtime
                    ]
                  );
                  # ++ (with inputs.intel-hw.packages."${system}"; [
                  #   # oneapi-dal
                  #   # oneapi-dpl
                  #   # oneapi-ccl
                  # ]);
                  # enable32Bit = true;
                };
                enableRedistributableFirmware = true;
              };
              nix.settings = {
                # keep-logs = true;
                trusted-users = [
                  "root"
                  "thek0tyara"
                ];
                download-buffer-size = 160000000;
              };
              age = {
                secrets = {
                  # "wg/syscon0.key".file = ./secrets/wg/syscon0.key.age;
                  "github/token.ro.age" = {
                    file = ./secrets/github/token.ro.age;
                    owner = "root";
                    group = "wheel";
                    mode = "0440";
                  };
                };
                identityPaths = [ "/root/.ssh/id_ed25519" ];
              };
              environment = {
                sessionVariables = {
                  LIBVA_DRIVER_NAME = "iHD";

                  LLAMA_CACHE = "/home/thek0tyara/Downloads/llm";

                  CCACHE_DIR = "/mnt/HDD_A_DATA/ccache";
                  # LLVM = "1";

                  # UV_CACHE_DIR = "";
                  # PIP_CACHE_DIR = "";
                  # PYTHONPYCACHEPREFIX = "";
                };
                systemPackages = with pkgs; [
                  ### compiler
                  ccache
                  sccache
                  (pkgdefault inputs.ragenix)
                  devenv
                  htop

                  ### storage
                  btrfs-progs

                  ### gpu
                  vulkan-tools
                  libva-utils
                  intel-gpu-tools
                  pciutils
                  inxi
                  mesa-demos
                  xhost

                  # llm
                  # llama-cpp-vulkan

                  ### development
                  git
                  nixpkgs-fmt
                  nixfmt
                  nixd
                  nil
                  android-tools
                ];
              };
              security = {
                polkit = {
                  enable = true;
                };
                sudo = {
                  extraRules = [
                    {
                      commands = [
                        {
                          command = "/run/current-system/sw/bin/nix";
                          options = [ "NOPASSWD" ];
                        }
                      ];
                      groups = [ "wheel" ];
                    }
                  ];
                };
              };
              # virtualisation.qemu = {
              #   options = [
              #   ];
              # };
              programs = {
                # amnezia-vpn.enable = true;
                ccache.enable = true;
                nix-ld = {
                  enable = true;
                  libraries = with pkgs; [
                    stdenv.cc.cc.lib
                  ];
                };
                obs-studio.enableVirtualCamera = true;
                steam = {
                  enable = true;
                  extraCompatPackages = [
                    inputs.dw-proton.packages.${system}.dw-proton
                  ];
                  protontricks = {
                    enable = true;
                  };
                };
                traceroute.enable = true;
                ydotool = {
                  enable = true;
                  group = "wheel";
                };
              };
              services = {
                displayManager = {
                  enable = true;
                  defaultSession = "niri";
                };
                locate.enable = true;
                pipewire = {
                  enable = true;
                  pulse.enable = true;
                };
                tor = {
                  enable = true;
                  client.enable = true;
                  relay = {
                    enable = true;
                    role = "relay";
                  };
                };
                xserver = {
                  enable = true;
                  displayManager.lightdm.enable = true;

                  xkb = {
                    layout = "us,ru";
                    options = "grp:alt_shift_toggle";
                  };
                };
                zerotierone = {
                  enable = true;
                  localConf = {
                    settings = {
                      bind = [ "10.20.0.201" ];
                    };
                  };
                };
              };
            }
          )
          ./configuration.nix
          #
          home-manager.nixosModules.default
          {
            home-manager = {
              useGlobalPkgs = true;
              useUserPackages = true;

              extraSpecialArgs = {
                inherit system;
                inherit ghostty;
              };

              users.thek0tyara = ./home.nix;
            };
          }
        ];
      };
    };
}