--- a/config.h.in	2022-11-28 07:10:54.564387362 +0100
+++ b/config.h.in	2022-11-28 07:12:15.435007668 +0100
@@ -156,3 +156,8 @@
 
 /* Define as `fork' if `vfork' does not work. */
 #undef vfork
+
+#if !defined(HAVE_WORKING_FORK) && !defined(HAVE_WORKING_VFORK)
+#define HAVE_WORKING_FORK 1
+#endif
+