See https://bugs.freedesktop.org/show_bug.cgi?id=47792;
should become obsolete with the next release.

diff -u luit-1.1.1.orig/sys.c luit-1.1.1/sys.c
--- luit-1.1.1.orig/sys.c	2012-03-23 05:23:07.000000000 +0100
+++ luit-1.1.1/sys.c	2013-11-27 22:45:53.000000000 +0100
@@ -20,6 +20,8 @@
 THE SOFTWARE.
 */
 
+#define _XOPEN_SOURCE 600
+
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
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<tr><td><span title='2024-01-31 21:59:11 -0500'>2024-01-31</span></td><td><a href='/guix/commit/gnu/packages/jami.scm?id=c76004c574acc3291e8d2526fe534719473a87ff'>gnu: jami: Update to 20240124.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/jami.scm (libjami): Update to 20240124.3.
(jami): Likewise.

Change-Id: Ib0d8d5d566c5633bf2e33b1874ded92f2e451ff5
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