use nixos-hardware from flake inputs

flake.nix

@@ -4,6 +4,7 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
     nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
   };
 
   outputs = { self, nixpkgs, ... }@inputs: {

nixos/hardware-configuration.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, modulesPath, ... }:
+{ config, lib, pkgs, modulesPath, inputs, ... }:
 
 
 let
@@ -8,12 +8,7 @@ in
   imports =
     [
       (modulesPath + "/installer/scan/not-detected.nix")
-      (
-        builtins.fetchGit {
-          url = "https://github.com/NixOS/nixos-hardware";
-          rev = "a4bc66709604ab78abc575b60baa6d23ae027a59";
-        } + "/lenovo/thinkpad/t440s"
-      )
+      (inputs.nixos-hardware + "/lenovo/thinkpad/t440s")
     ];
 
   boot.initrd.availableKernelModules = [ "xhci_pci" "ehci_pci" "ahci" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];