bundlerUpdateScript: init and use (#64822)

pkgs/tools/networking/maphosts/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby }:
+{ stdenv, lib, bundlerEnv, ruby, bundlerUpdateScript }:
 
 stdenv.mkDerivation rec {
   name = "maphosts-${env.gems.maphosts.version}";
@@ -16,11 +16,13 @@ stdenv.mkDerivation rec {
     ln -s "${env}/bin/maphosts" "$out/bin/maphosts"
   '';
 
+  passthru.updateScript = bundlerUpdateScript "maphosts";
+
   meta = with lib; {
     description = "Small command line application for keeping your project hostnames in sync with /etc/hosts";
     homepage    = https://github.com/mpscholten/maphosts;
     license     = licenses.mit;
-    maintainers = with maintainers; [ mpscholten ];
+    maintainers = with maintainers; [ mpscholten nicknovitski ];
     platforms   = platforms.all;
   };
 }