flake.lock

@@ -704,6 +704,22 @@
       }
     },
     "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1778443072,
+        "narHash": "sha256-zi7/fsqM/kFdNuED//4WOCUtezGtKKqRNORjMvfwjnA=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "da5ad661ba4e5ef59ba743f0d112cbc30e474f32",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1767799921,
         "narHash": "sha256-r4GVX+FToWVE2My8VVZH4V0pTIpnu2ZE8/Z4uxGEMBE=",
@@ -767,12 +783,31 @@
         "type": "github"
       }
     },
+    "proton-cachyos-nix": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1778652748,
+        "narHash": "sha256-6xwY6bOS0dC1+W9rSzfpu7eQPYyFHR55e06uHkDzoLo=",
+        "owner": "powerofthe69",
+        "repo": "proton-cachyos-nix",
+        "rev": "29103f9fac8fa7f2b682315baa7d548863ca04cb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "powerofthe69",
+        "repo": "proton-cachyos-nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "home-manager-stable": "home-manager-stable",
         "hyprland": "hyprland",
         "nix-cachyos-kernel": "nix-cachyos-kernel",
         "nixpkgs-stable": "nixpkgs-stable",
+        "proton-cachyos-nix": "proton-cachyos-nix",
         "stylix": "stylix",
         "zen-browser": "zen-browser"
       }
@@ -786,7 +821,7 @@
         "firefox-gnome-theme": "firefox-gnome-theme",
         "flake-parts": "flake-parts_2",
         "gnome-shell": "gnome-shell",
-        "nixpkgs": "nixpkgs_3",
+        "nixpkgs": "nixpkgs_4",
         "nur": "nur",
         "systems": "systems_2",
         "tinted-foot": "tinted-foot",

flake.nix

@@ -18,6 +18,8 @@
 
     nix-cachyos-kernel.url = "github:xddxdd/nix-cachyos-kernel/release";
 
+    proton-cachyos-nix.url = "github:powerofthe69/proton-cachyos-nix";
+
     # Pin Hyprland to upstream so we get the 0.52.2+ fixes ahead of
     # nixos-25.11's slower bump cadence. Doesn't follow our nixpkgs —
     # upstream needs newer stdenv than 25.11 ships.
@@ -36,6 +38,7 @@
     , nix-cachyos-kernel
     , hyprland
     , stylix
+    , proton-cachyos-nix
     , ...
     } @ inputs:
     let

hosts/FredOS-Gaming.nix

@@ -33,6 +33,9 @@
     programs.steam = {
       enable = true;
       remotePlay.openFirewall = true;
+      extraCompatPackages = [
+        inputs.proton-cachyos-nix.packages.${pkgs.stdenv.hostPlatform.system}.proton-cachyos-x86_64-v3
+      ];
       package = pkgs.steam.override {
         extraPkgs = pkgs: with pkgs; [
           adwaita-icon-theme