diff --git a/src/installation.ml b/src/installation.ml
index 3c64e395..be7d6e7b 100644
--- a/src/installation.ml
+++ b/src/installation.ml
@@ -39,13 +39,4 @@ let rec normalize fn =
    and hope that it is of the form [.../bin/menhir]. We change this to
    [.../lib/menhirLib], and hope that this is where MenhirLib is installed. *)
 
-let libdir () =
-  let root =
-    Sys.executable_name
-    |> normalize
-    |> Filename.dirname (* remove [menhir] *)
-    |> Filename.dirname (* remove [bin] *)
-  in
-  Filename.concat
-    root
-    (Filename.concat "lib" "menhirLib")
+let libdir () = ignore normalize; "@libdir@"