Index: ext/extconf.rb
--- ext/extconf.rb.orig
+++ ext/extconf.rb
@@ -147,7 +147,7 @@ if RbConfig::CONFIG["host_os"] =~ /mingw/
   add_define "FD_SETSIZE=32767" unless found
 end
 
-# Main platform invariances:
+create_makefile "rubyeventmachine"
 
 case RUBY_PLATFORM
 when /mswin32/, /mingw32/, /bccwin32/