nixos/steam: init

nixos/modules/module-list.nix

@@ -156,6 +156,7 @@
   ./programs/ssmtp.nix
   ./programs/sysdig.nix
   ./programs/systemtap.nix
+  ./programs/steam.nix
   ./programs/sway.nix
   ./programs/system-config-printer.nix
   ./programs/thefuck.nix

nixos/modules/programs/steam.nix

@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.steam;
+in {
+  options.programs.steam.enable = mkEnableOption "steam";
+
+  config = mkIf cfg.enable {
+    hardware.opengl = { # this fixes the "glXChooseVisual failed" bug, context: https://github.com/NixOS/nixpkgs/issues/47932
+      enable = true;
+      driSupport32Bit = true;
+    };
+
+    # optionally enable 32bit pulseaudio support if pulseaudio is enabled
+    hardware.pulseaudio.support32Bit = config.hardware.pulseaudio.enable;
+
+    hardware.steam-hardware.enable = true;
+
+    environment.systemPackages = [ pkgs.steam ];
+  };
+
+  meta.maintainers = with maintainers; [ mkg20001 ];
+}