--- src/utils/lib/os_stubs.h	2024-08-20 05:14:48
+++ src/utils/lib/os_stubs.h	2026-06-07 00:00:00
@@ -96,6 +96,7 @@
 #include <caml/alloc.h>
 #include <caml/memory.h>
 #include <caml/fail.h>
+#include <caml/unixsupport.h>
 #include <caml/custom.h>
 #include <caml/callback.h>

@@ -150,6 +151,4 @@
 #define Nothing ((value) 0)

-extern void unix_error (int errcode, char * cmdname, value arg) Noreturn;
-extern void uerror (char * cmdname, value arg) Noreturn;

 extern OFF_T os_lseek(OS_FD fd, OFF_T pos, int dir);
 extern void os_ftruncate(OS_FD fd, OFF_T len, int sparse);
--- src/utils/cdk/gdstubs.c	2024-08-20 05:14:48
+++ src/utils/cdk/gdstubs.c	2026-06-07 00:00:00
@@ -32,6 +32,7 @@
 #include <caml/callback.h>
 #include <caml/fail.h>
 #include <caml/alloc.h>
+#include <caml/io.h>

 #include <gd.h>
 #include <gdfontl.h>