diff --git a/bin/main.ml b/bin/main.ml
index 8abea47d3b2..438fc4698a6 100644
--- a/bin/main.ml
+++ b/bin/main.ml
@@ -169,15 +169,19 @@ let default =
        ; `Blocks Common.help_secs
        ])
 
+let error_exit () = 
+  prerr_endline "DUNE BUILD FAILED";
+  exit 1 
 let main () =
   Colors.setup_err_formatter_colors ();
   try
     match Term.eval_choice default all ~catch:false with
-    | `Error _ -> exit 1
+    | `Error _ ->       
+      error_exit ()
     | _ -> exit 0
   with
-  | Fiber.Never -> exit 1
+  | Fiber.Never -> error_exit ()
   | exn ->
     let exn = Exn_with_backtrace.capture exn in
     Report_error.report exn;
-    exit 1
+    error_exit ()
diff --git a/src/scheduler.ml b/src/scheduler.ml
index 7c6091e0cae..5c78ec9d95b 100644
--- a/src/scheduler.ml
+++ b/src/scheduler.ml
@@ -739,6 +739,7 @@ let poll ?log ?config ~once ~finally () =
       Exit
   in
   let wait msg =
+    Format.fprintf Format.err_formatter "@.DUNE Finish building@.";
     let old_generator = Console.get_status_line_generator () in
     set_status_line_generator
       (fun () ->
@@ -750,6 +751,7 @@ let poll ?log ?config ~once ~finally () =
     res
   in
   let rec loop () =
+    Format.fprintf Format.err_formatter "@.DUNE Start building@.";
     let res = Run_once.run_and_cleanup t once in
     finally ();
     match res with