Попытка установить memcached-northscale и получение странной ошибки.Любая помощь будет оценена.
$ sudo gem install memcached-northscale
Building native extensions. This could take a while...
ERROR: Error installing memcached-northscale:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h