--- jruby-launcher/ng.c.orig	Sat Sep 10 11:31:48 2016
+++ jruby-launcher/ng.c	Sat Sep 10 11:32:03 2016
@@ -28,6 +28,7 @@
         #include <arpa/inet.h>
         #include <netdb.h>
         #include <netinet/in.h>
+        #include <sys/select.h> /* fd_set */
         #include <sys/socket.h>
         #include <sys/types.h>
 #endif