--- include/gavl/clock_nanosleep.h.orig	2025-05-13 00:14:26.000000000 +0800
+++ include/gavl/clock_nanosleep.h	2025-05-13 00:17:09.000000000 +0800
@@ -3,6 +3,7 @@
 
 #include <time.h>
 #include <unistd.h>
+#include <errno.h>
 
 #ifdef __APPLE__
 // macOS <10.12 doesn't have clockid_t / CLOCK_MONOTONIC