fix: refactor flake.nix, home-manager/home.nix, nixos/configuration.nix to avoid home-manager.useGlobalPkgs conflict error

flake.nix

@@ -31,40 +31,16 @@
     { ... }@inputs:
     let
       system = "x86_64-linux";
-      pkgs = import inputs.nixpkgs {
+      #pkgs = import inputs.nixpkgs {
-        inherit system;
+      #  inherit system;
-        config.allowUnfree = true;
+      #};
-      };
       hostName = "january";
+      userName = "autumn";
     in
     {
       nixosConfigurations.${hostName} = inputs.nixpkgs.lib.nixosSystem {
-        inherit system;
+        specialArgs = { inherit inputs; inherit hostName; };
-        inherit pkgs;
+	modules = [ ./nixos/configuration.nix ];
-        specialArgs = {
-          inherit hostName;
-        };
-        modules = [
-          ./nixos/configuration.nix
-
-          inputs.home-manager.nixosModules.home-manager
-          {
-            home-manager.backupFileExtension = "hm-bak";
-
-            home-manager.extraSpecialArgs = { inherit inputs; };
-
-            home-manager.sharedModules = [
-              inputs.nixvim.homeModules.nixvim
-              inputs.stylix.homeModules.stylix
-              inputs.zen-browser.homeModules.default
-            ];
-
-            home-manager.useGlobalPkgs = true;
-            home-manager.useUserPackages = true;
-
-            home-manager.users."autumn" = ./home-manager/home.nix;
-          }
-        ];
       };
     };
 }

home-manager/home.nix

@@ -1,6 +1,10 @@
-{ pkgs, ... }:
+{ inputs, pkgs, ... }:
 {
   imports = [
+    inputs.nixvim.homeModules.nixvim
+    inputs.stylix.homeModules.stylix
+    inputs.zen-browser.homeModules.default
+
     ./programs
 
     ./clangd.nix
@@ -14,6 +18,11 @@
   home.homeDirectory = "/home/autumn";
   home.stateVersion = "25.05";
 
+  nixpkgs.config = {
+    allowUnfree = true;
+    allowUnfreePredicate = _: true;
+  };
+
   home.pointerCursor = {
     name = "Adwaita";
     package = pkgs.adwaita-icon-theme;

nixos/configuration.nix

@@ -1,20 +1,25 @@
-{ pkgs, hostName, ... }:
+{ inputs, hostName, pkgs, ... }:
 
 {
   imports = [
     ./hardware-configuration.nix
+    inputs.home-manager.nixosModules.home-manager
   ];
 
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
   boot.tmp.cleanOnBoot = true;
 
+  nix.package = pkgs.lixPackageSets.latest.lix;
+
   networking.hostName = "${hostName}";
 
   hardware.graphics.enable = true;
 
   networking.networkmanager.enable = true;
 
+  nixpkgs.config.allowUnfree = true;
+
   time.timeZone = "America/Toronto";
 
   i18n.defaultLocale = "en_CA.UTF-8";
@@ -24,6 +29,13 @@
     KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0660", GROUP="users", TAG+="uaccess", TAG+="udev-acl"
   '';
 
+  home-manager = {
+    extraSpecialArgs = { inherit inputs; };
+    users = {
+      autumn = import ../home-manager/home.nix;
+    };
+  };
+
   services.gnome.glib-networking.enable = true;
 
   programs.hyprland = {