steam update

modules/software/distractions/steam.nix

@@ -6,10 +6,41 @@ let
 in {
   options.modules.software.distractions.steam = {
     enable = mkEnableOption "Enable Steam, the game distribution software";
+    useGamescope = mkEnableOption "Enable Gamescope, a tool to run games in a separate X session";
   };
 
   config = mkIf cfg.enable {
-    programs.steam.enable = true;
-    programs.steam.protontricks.enable = true;
+    programs.steam = {
+      enable = true;
+      package = pkgs.steam.override {
+        # required for programs to run sometimes
+        # see: https://github.com/NixOS/nixpkgs/issues/162562#issuecomment-1229444338
+        extraPkgs = (pkgs: (lib.optional cfg.useGamescope pkgs.gamescope) ++ (with pkgs; [
+          xorg.libXcursor
+          xorg.libXi
+          xorg.libXinerama
+          xorg.libXScrnSaver
+          libpng
+          libpulseaudio
+          libvorbis
+          stdenv.cc.cc.lib
+          libkrb5
+          keyutils
+        ]));
+      };
+      extraCompatPackages = with pkgs; [ proton-ge-bin ];
+      protontricks.enable = true;
+
+      localNetworkGameTransfers.openFirewall = true;
+      remotePlay.openFirewall = true;
+      dedicatedServer.openFirewall = true;
+    };
+
+    programs.gamescope = {
+      enable = true;
+      # capSysNice = true; https://github.com/NixOS/nixpkgs/issues/351516
+    };
+
+    user.packages = with pkgs; [ steam-run ];
   };
 }