--- gimp-3.0.0/libgimpbase/gimputils.c.~1~	2025-03-16 20:44:19.000000000 -0400
+++ gimp-3.0.0/libgimpbase/gimputils.c	2025-03-18 20:55:21.536525955 -0400
@@ -63,6 +63,9 @@
 
 #endif /* G_OS_WIN32 */
 
+/* Does thr_self work on OpenIndiana? If so, how is it supposed to be included? */
+#undef HAVE_THR_SELF
+
 #include "gimpbasetypes.h"
 #include "gimputils.h"