diff -Naur coolio-1.1.0.orig/ext/cool.io/ev_wrap.h coolio-1.1.0/ext/cool.io/ev_wrap.h
--- coolio-1.1.0.orig/ext/cool.io/ev_wrap.h	2012-03-15 03:30:08.755266522 +0900
+++ coolio-1.1.0/ext/cool.io/ev_wrap.h	2012-03-15 03:31:50.839378421 +0900
@@ -4,5 +4,5 @@
 # define FD_SETSIZE 2048 /* wishful thinking, as msvcrt6 [?] seems to only allow 512 fd's and 256 sockets max */
 #endif
 
-#include "../libev/ev.h"
+#include "ev.h"
 
diff -Naur coolio-1.1.0.orig/ext/cool.io/extconf.rb coolio-1.1.0/ext/cool.io/extconf.rb
--- coolio-1.1.0.orig/ext/cool.io/extconf.rb	2012-03-15 03:30:08.755266522 +0900
+++ coolio-1.1.0/ext/cool.io/extconf.rb	2012-03-15 03:31:04.114327009 +0900
@@ -20,6 +20,10 @@
   libs << "-lrt"
 end
 
+if have_library('ev', 'ev_loop_new')
+  libs << "-lev"
+end
+
 if have_header('sys/select.h')
   $defs << '-DEV_USE_SELECT'
 end