NixOS module: Remove

With an instruction on how to migrate usage over to `systemPackages`.

README.md

@@ -6,10 +6,10 @@ Nix flake for using [Lossless Scaling's frame generation on Linux](https://githu
 > In case it is not installed on the default Steam drive, you may want to consider setting the correct path in the lsfg-vk config.
 
 ## Installation
-### System-wide (NixOS module)
+### System-wide (NixOS)
 This approach will install an implicit layer to ``/etc/vulkan/implicit_layer.d/``
 
-Add this to your flake inputs, output function and modules list:
+Add this to your flake inputs, output function and configuration:
 ```nix
 inputs = {
   ...
@@ -21,22 +21,14 @@ outputs = {nixpkgs, lsfg-vk-flake, ...}: {
 
   nixosConfigurations.hostname = nixpkgs.lib.nixosSystem {
     ...
-    modules = [
-      ...
-      lsfg-vk-flake.nixosModules.default
+    environment.systemPackages = [
+      lsfg-vk-flake.packages.${system}.lsfg-vk
+      lsfg-vk-flake.packages.${system}.lsfg-vk-ui
     ];
   };
 }
 ```
 
-And then enable this in your system config:
-```nix 
-services.lsfg-vk = {
-  enable = true;
-  ui.enable = true; # installs gui for configuring lsfg-vk
-};
-```
-
 ### User install (manual)
 1. Build the library:
   ```bash

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1753694789,
-        "narHash": "sha256-cKgvtz6fKuK1Xr5LQW/zOUiAC0oSQoA9nOISB0pJZqM=",
+        "lastModified": 1754498491,
+        "narHash": "sha256-erbiH2agUTD0Z30xcVSFcDHzkRvkRXOQ3lb887bcVrs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dc9637876d0dcc8c9e5e22986b857632effeb727",
+        "rev": "c2ae88e026f9525daf89587f3cbee584b92b6134",
         "type": "github"
       },
       "original": {

module.nix

@@ -1,69 +1,26 @@
 {
-  config,
   lib,
-  pkgs,
   ...
 }:
 let
-  cfg = config.services.lsfg-vk;
-  lsfg-vk = pkgs.callPackage ./lsfg-vk.nix { };
-  lsfg-vk-ui = pkgs.callPackage ./lsfg-vk-ui.nix { };
+  inherit (lib.modules) mkRemovedOptionModule;
 in
 {
-  options = {
-    services.lsfg-vk = {
-      enable = lib.mkEnableOption "Lossless Scaling Frame Generation Vulkan layer";
-
-      ui.enable = lib.mkEnableOption "Enables a GUI for configuring lsfg-vk";
-
-      package = lib.mkOption {
-        type = lib.types.package;
-        description = "The lsfg-vk package to use";
-        default = lsfg-vk;
-      };
-
-      losslessDLLFile = lib.mkOption {
-        type = with lib.types; nullOr str;
-        default = null;
-        example = "/home/user/games/Lossless Scaling/Lossless.dll";
-        description = ''
-          Sets the LSFG_DLL_PATH environment variable.
-          Required if Lossless Scaling isn't installed in a standard location
-        '';
-      };
-
-      configFile = lib.mkOption {
-        type = with lib.types; nullOr str;
-        default = null;
-        example = "/home/user/.config/lsfg-vk/conf.toml";
-        description = ''
-          Sets the LSFG_CONFIG environment variable.
-          Required if the lsfg-vk configuration file isn't stored at the standard location
-        '';
-      };
-    };
-  };
-
-  config = lib.mkIf cfg.enable (
-    lib.mkMerge [
-      {
-        environment.systemPackages = [ cfg.package ];
-
-        # Installs the Vulkan implicit layer system-wide
-        environment.etc."vulkan/implicit_layer.d/VkLayer_LS_frame_generation.json".source =
-          "${cfg.package}/share/vulkan/implicit_layer.d/VkLayer_LS_frame_generation.json";
-      }
-      (lib.mkIf cfg.ui.enable {
-        environment.systemPackages = [ lsfg-vk-ui ];
-      })
-      (lib.mkIf (cfg.losslessDLLFile != null) {
-        environment.sessionVariables.LSFG_DLL_PATH =
-          lib.warn "losslessDLLFile is deprecated and will only be used by lsfg-vk if LSFG_LEGACY is set."
-          cfg.losslessDLLFile;
-      })
-      (lib.mkIf (cfg.configFile != null) {
-        environment.sessionVariables.LSFG_CONFIG = cfg.configFile;
-      })
+  imports = [
+    (mkRemovedOptionModule
+      [
+        "services"
+        "lsfg-vk"
       ]
-  );
+      ''
+        The lsfg-vk-flake NixOS module has been removed as adding packages to the environment is already sufficient.
+
+        Simply add lsfg-vk & lsfg-vk-ui to your environment.systemPackages:
+        environment.systemPackages = [
+          pkgs.lsfg-vk
+          pkgs.lsfg-vk-ui
+        ];
+      ''
+    )
+  ];
 }