diff -ruN a/modules/pam_unix/support.c b/modules/pam_unix/support.c
--- a/modules/pam_unix/support.c	2024-01-17 19:29:36.000000000 +0900
+++ b/modules/pam_unix/support.c	2024-03-15 14:30:11.487011492 +0900
@@ -21,6 +21,8 @@
 #include <sys/resource.h>
 #ifdef HAVE_NIS
 #include <rpcsvc/ypclnt.h>
+#else
+#define YPERR_SUCCESS 0
 #endif
 
 #include <security/_pam_macros.h>