--- ext/zip/lib/mkstemp.c.bak	2019-01-09 10:54:13.000000000 +0100
+++ ext/zip/lib/mkstemp.c	2026-03-03 19:48:02.521698567 +0100
@@ -43,6 +43,7 @@
 #endif
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #ifndef O_BINARY
 #define O_BINARY 0