enable millennium for steam

flake.lock

@@ -362,6 +362,46 @@
         "type": "github"
       }
     },
+    "millennium": {
+      "inputs": {
+        "millennium-src": "millennium-src",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "dir": "packages/nix",
+        "lastModified": 1790520975,
+        "narHash": "sha256-kk+bzZx7d+noy1YPrbt2Z0GBUzxKykU/+1clGCIPHQ8=",
+        "owner": "SteamClientHomebrew",
+        "repo": "Millennium",
+        "rev": "847e0dad6c33ab9f11bdd4e7ca2e90cd26aef416",
+        "type": "github"
+      },
+      "original": {
+        "dir": "packages/nix",
+        "owner": "SteamClientHomebrew",
+        "repo": "Millennium",
+        "type": "github"
+      }
+    },
+    "millennium-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1790436335,
+        "narHash": "sha256-ghYUa4gPLV/VOflM2zkl/gtdwLWHQpRxG4boQoj4yKM=",
+        "owner": "SteamClientHomebrew",
+        "repo": "Millennium",
+        "rev": "765aa8802f8a4d942ad8ac8323a9e0f233a50fa8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "SteamClientHomebrew",
+        "repo": "Millennium",
+        "rev": "765aa8802f8a4d942ad8ac8323a9e0f233a50fa8",
+        "type": "github"
+      }
+    },
     "nix-cachyos-kernel": {
       "inputs": {
         "flake-compat": "flake-compat_3",
@@ -491,6 +531,7 @@
         "aagl": "aagl",
         "home-manager": "home-manager",
         "lanzaboote": "lanzaboote",
+        "millennium": "millennium",
         "nix-cachyos-kernel": "nix-cachyos-kernel",
         "nixpkgs": "nixpkgs_2",
         "simple-wallpaper-engine": "simple-wallpaper-engine",

flake.nix

@@ -52,6 +52,10 @@
       url = "github:Maxnights/simple-linux-wallpaperengine-gui";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    millennium = {
+      url = "github:SteamClientHomebrew/Millennium?dir=packages/nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = inputs:
@@ -95,6 +99,7 @@
         # Use the exact kernel versions as defined in this repo.
         # Guarantees you have binary cache.
         nix-cachyos-kernel.overlays.pinned
+        inputs.millennium.overlays.default
       ];
       
       nixos = with inputs; [

modules/nixos/steam/default.nix

@@ -74,7 +74,7 @@
     
     programs.steam = {
       enable = true;
-      package = pkgs.steam.override {
+      package = pkgs.millennium-steam.override {
         extraPkgs = pkgs: with pkgs; [
           gamemode
           noto-fonts-color-emoji