xivlauncher: add explicit dependency on aria2

pkgs/games/xivlauncher/default.nix

@@ -44,6 +44,9 @@ in
         --replace 'exec' 'exec ${steam-run}/bin/steam-run'
     '' + ''
       wrapProgram $out/bin/XIVLauncher.Core --prefix GST_PLUGIN_SYSTEM_PATH_1_0 ":" "$GST_PLUGIN_SYSTEM_PATH_1_0"
+      # the reference to aria2 gets mangled as UTF-16LE and isn't detectable by nix: https://github.com/NixOS/nixpkgs/issues/220065
+      mkdir -p $out/nix-support
+      echo ${aria2} >> $out/nix-support/depends
     '';
 
     executables = [ "XIVLauncher.Core" ];