--- src/utils/lib/misc2.mlcpp	2024-08-20 05:14:48
+++ src/utils/lib/misc2.mlcpp	2026-06-07 00:00:00
@@ -63,7 +63,7 @@

 let map_file file =
   let open Bigarray in
-#if OCAMLVERSION_MAJOR < 406
+#if OCAMLVERSION_MAJOR < 406 && OCAMLVERSION_MAJOR >= 400
   Array1.map_file (Unix.descr_of_in_channel file)
     int8_unsigned c_layout false (-1)
 #else