Fix tf2 in steam

nixos/kalle-pc/configuration.nix

@@ -91,6 +91,7 @@
     slurp # Some for this one
 
     gamescope
+    pkgsi686Linux.gperftools # Needed for tf2
   ];
 
   fonts = {
@@ -131,6 +132,9 @@
         libkrb5
         keyutils
       ];
+      extraLibraries = pkgs: with pkgs; [
+        gperftools # Needed for tf2 to work
+      ];
     };
   };