{pkgs, ...}: {
  xdg.desktopEntries = {
    steam = {
      # The key 'steam' will result in the file 'steam.desktop'
      name = "Steam";
      genericName = "Game Platform";
      comment = "Play and discuss games.";
      exec = "${pkgs.mangohud}/bin/mangohud ${pkgs.steam}/bin/steam %U"; # The standard command to launch Steam
      terminal = false;
      icon = "steam"; # Assumes the 'steam' icon is available in your icon theme
      type = "Application";
      categories = ["Game" "Network"];
      mimeType = [
        "x-scheme-handler/steam" # For handling steam:// links
      ];
      # If you want to add actions (like launching in Big Picture mode)
      actions = {
        BigPicture = {
          name = "Big Picture Mode";
          exec = "${pkgs.mangohud}/bin/mangohud ${pkgs.steam}/bin/steam steam://open/bigpicture";
        };
        Store = {
          name = "Store";
          exec = "${pkgs.mangohud}/bin/mangohud ${pkgs.steam}/bin/steam steam://store";
        };
        Library = {
          name = "Library";
          exec = "${pkgs.mangohud}/bin/mangohud ${pkgs.steam}/bin/steam steam://library";
        };
      };
      # You might also want StartupWMClass if Steam has a specific window class name
      # StartupWMClass = "Steam";
    };
  };
}