packages: Finally fix the conundrum with bubblewrapped steam

packages/default.nix

@@ -4,7 +4,6 @@ let
   pySmartDL = pkgs.callPackage ./development/python/pySmartDL {};
   cfscrape = pkgs.callPackage ./development/python/cfscrape {};
   system_hotkey = pkgs.callPackage ./development/python/system_hotkey {};
-  buildFHSUserEnvBubblewrap = pkgs.callPackage ./build-support/build-fhs-userenv-bubblewrap {};
   discord-system-electron = pkgs.callPackage ./applications/networking/instant-messengers/discord {
     # Wayland
     # NOTE: electron under Wayland has no window titlebars
@@ -60,4 +59,19 @@ in {
   surface-control = pkgs.callPackage ./tools/system/surface-control {};
 
   trackma = pkgs.callPackage ./tools/video/trackma {};
+
+  steam-wrapped = wrapInSandbox {
+    name = "steam";
+    package = pkgs.steam;
+    binaryName = "steam";
+    mountInHome = [ ".steam" ".local/share/Steam" ];
+    additionalBlacklist = [ "/mnt" ];
+    additionalMounts = [ "/mnt/Storage/Games/SteamLibrary" ];
+    chdirTo = "/home/$USER";
+    extraEnv = {
+      DRI_PRIME = "1";
+    };
+
+    copyIntoSandbox = [ "/share" ];
+  };
 }