From 7ef6a72fc0800a78267b341ad08404720cf2db14 Mon Sep 17 00:00:00 2001
From: Jonni Liljamo <jonni@liljamo.com>
Date: Mon, 8 Dec 2025 19:48:34 +0200
Subject: [PATCH] feat: gaming and friends

---
 modules/home/mangohud.nix | 28 ++++++++++++++++++++++++++++
 modules/nixos/gaming.nix  |  7 +++++++
 modules/nixos/steam.nix   | 25 +++++++++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 modules/home/mangohud.nix
 create mode 100644 modules/nixos/gaming.nix
 create mode 100644 modules/nixos/steam.nix

diff --git a/modules/home/mangohud.nix b/modules/home/mangohud.nix
new file mode 100644
index 0000000..b732648
--- /dev/null
+++ b/modules/home/mangohud.nix
@@ -0,0 +1,28 @@
+{
+  flake.modules.homeManager.mangohud = {...}: {
+    programs.mangohud = {
+      enable = true;
+      enableSessionWide = false;
+      settings = {
+        fps_limit = "60,90,120,200";
+        time = true;
+
+        gpu_stats = true;
+        gpu_temp = true;
+        gpu_text = "GPU";
+
+        cpu_stats = true;
+        cpu_temp = true;
+        cpu_text = "CPU";
+
+        vram = true;
+        ram = true;
+
+        fps = true;
+        frametime = true;
+        frame_timing = true;
+        show_fps_limit = true;
+      };
+    };
+  };
+}
diff --git a/modules/nixos/gaming.nix b/modules/nixos/gaming.nix
new file mode 100644
index 0000000..c02d1ae
--- /dev/null
+++ b/modules/nixos/gaming.nix
@@ -0,0 +1,7 @@
+{
+  flake.modules.nixos.gaming = {...}: {
+    boot.kernel.sysctl."vm.max_map_count" = 1048576;
+
+    programs.gamemode.enable = true;
+  };
+}
diff --git a/modules/nixos/steam.nix b/modules/nixos/steam.nix
new file mode 100644
index 0000000..b93774a
--- /dev/null
+++ b/modules/nixos/steam.nix
@@ -0,0 +1,25 @@
+{config, ...}: {
+  flake.modules.nixos.steam = {...}: {
+    imports = with config.flake.modules.nixos; [
+      unfree
+      gaming
+    ];
+
+    arta.unfree.allow = [
+      "steam"
+      "steam-unwrapped"
+    ];
+
+    programs.steam = {
+      enable = true;
+      # TODO: verify if needed anymore
+      /*
+        extraPackages = with pkgs; [
+        # Fallback fonts (e.g. for Don't Get Lost).
+        liberation_ttf
+      ];
+      */
+    };
+    hardware.steam-hardware.enable = true;
+  };
+}
-- 
2.44.1