use acer-wmi-ext overlay from source repo

flake.lock

@@ -1,5 +1,26 @@
 {
   "nodes": {
+    "acer-wmi-ext": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1776998627,
+        "narHash": "sha256-n0ENc4Xi1d3ApoHTRsfssC6AAroFgIKXJzJFykxNanY=",
+        "owner": "Lumpiasty",
+        "repo": "acer-wmi-ext",
+        "rev": "d0be381bbd661ed4bb327a9c92b980a0b9edacac",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Lumpiasty",
+        "ref": "main",
+        "repo": "acer-wmi-ext",
+        "type": "github"
+      }
+    },
     "cf": {
       "locked": {
         "lastModified": 1756852014,
@@ -340,6 +361,7 @@
     },
     "root": {
       "inputs": {
+        "acer-wmi-ext": "acer-wmi-ext",
         "claude-code": "claude-code",
         "home-manager": "home-manager",
         "lanzaboote": "lanzaboote",

flake.nix

@@ -30,6 +30,10 @@
       url = "git+ssh://git@gitea.lumpiasty.xyz/Lumpiasty/peerix.git"; # fork of github:sophronesis/peerix
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    acer-wmi-ext = {
+      url = "github:Lumpiasty/acer-wmi-ext/main";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
   
   outputs = { self, nixos-hardware, ... }@inputs:

lib/mkNixosSystem.nix

@@ -8,6 +8,7 @@
   claude-code,
   nix-sweep,
   peerix,
+  acer-wmi-ext,
   ...
 }:
 hardwareConfig: hostConfig:
@@ -17,10 +18,14 @@ nixpkgs.lib.nixosSystem {
   specialArgs = {
     inherit nix-flatpak;
     inherit plasma-manager;
+    inherit acer-wmi-ext;
   };
   modules = [
     {
-      nixpkgs.overlays = [ claude-code.overlays.default ];
+      nixpkgs.overlays = [
+        claude-code.overlays.default
+        acer-wmi-ext.overlays.default
+      ];
       nix.settings = {
         substituters = [ "https://claude-code.cachix.org" ];
         trusted-public-keys = [ "claude-code.cachix.org-1:YeXf2aNu7UTX8Vwrze0za1WEDS+4DuI2kVeWEE4fsRk=" ];

overlays/pkgs.nix

@@ -1,7 +1,4 @@
 self: super:
 {
   opencode-claude-auth = super.callPackage ../pkgs/opencode-claude-auth {};
-  linuxPackages = super.linuxPackages.extend (lpself: lpsuper: {
-    acer-wmi-ext = lpsuper.callPackage ../pkgs/acer-wmi-ext {};
-  });
 }

pkgs/acer-wmi-ext/default.nix

@@ -1,44 +0,0 @@
-# Custom module for Acer WMI features, like battery charge limit and fan control
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  kernel
-}:
-
-stdenv.mkDerivation {
-  pname = "acer-wmi-ext";
-  version = "0.0.0";
-
-  src = fetchFromGitHub {
-    owner = "Lumpiasty";
-    repo = "acer-wmi-ext";
-    rev = "71bc84f4729eb53e7786aaed37957c6d91ce0cfd";
-    sha256 = "sha256-eMKEVgEFaBB1oDL5mlmnJyEj24jzi8HsISl3cCzstD8=";
-  };
-
-  nativeBuildInputs = [ kernel.moduleBuildDependencies ];
-
-  # Makefile provided in repo is useless, hardcoded paths, not using it
-
-  setSourceRoot = ''
-    export sourceRoot=$(pwd)/source
-  '';
-
-  makeFlags = [
-    "-C"
-    "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
-    "M=$(sourceRoot)"
-  ];
-
-  buildFlags = [ "modules" ];
-  installFlags = [ "INSTALL_MOD_PATH=${placeholder "out"}" ];
-  installTargets = [ "modules_install" ];
-
-  meta = {
-    description = "Acer WMI kernel module for battery charge limit and fan control";
-    homepage = "https://github.com/TenSeventy7/acer-wmi-ext";
-    license = lib.licenses.gpl2;
-    platforms = lib.platforms.linux;
-  };
-}