bundler_rbx_mysql_fail

➜  rails git:(spastorino-master) bundle update
...
Installing mysql (2.8.1) with native extensions An exception occurred running /Users/santiago/.rvm/gems/rbx-head@global/bin/bundle
    ERROR: Failed to build gem native extension.

/Users/santiago/.rvm/rubies/rbx-head/bin/rbx extconf.rb 
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... no
checking for rb_thread_start_timer()... no
checking for mysql.h... 

Gem files will remain installed in /Users/santiago/.rvm/gems/rbx-head/gems/mysql-2.8.1 for inspection.
Results logged to /Users/santiago/.rvm/gems/rbx-head/gems/mysql-2.8.1/ext/mysql_api/gem_make.out
 (Gem::Installer::ExtensionBuildError)

Backtrace:
  { } in Gem::Installer#build_extensions at /Users/santiago/.rvm/rubies/rbx-head/lib/rubygems/installer.rb:483
                            Array#each at kernel/bootstrap/array.rb:66
       Gem::Installer#build_extensions at /Users/santiago/.rvm/rubies/rbx-head/lib/rubygems/installer.rb:446
                Gem::Installer#install at /Users/santiago/.rvm/rubies/rbx-head/lib/rubygems/installer.rb:198
     Bundler::Source::Rubygems#install at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/source.rb:100
         { } in Bundler::Installer#run at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/installer.rb:55
          { } in Bundler::SpecSet#each at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/spec_set.rb:12
                            Array#each at kernel/bootstrap/array.rb:66
                 Bundler::SpecSet#each at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/spec_set.rb:12
                Bundler::Installer#run at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/installer.rb:44
            Bundler::Installer.install at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/installer.rb:8
                   Bundler::CLI#update at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/cli.rb:267
                        Thor::Task#run at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/vendor/thor/task.rb:22
  Thor::Invocation(Bundler::CLI)#invoke_task at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/vendor/thor/invocation.rb:118
                         Thor.dispatch at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/vendor/thor.rb:246
  Thor::Base::ClassMethods(Class)#start at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/lib/bundler/vendor/thor/base.rb:389
                       main.__script__ at /Users/santiago/.rvm/gems/rbx-head@global/gems/bundler-1.0.3/bin/bundle:13
                   Kernel(Object)#load at kernel/common/kernel.rb:666
                       main.__script__ at /Users/santiago/.rvm/gems/rbx-head@global/bin/bundle:19
      Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:67
      Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:91
               Rubinius::Loader#script at kernel/loader.rb:460
                 Rubinius::Loader#main at kernel/loader.rb:571
                 Rubinius::Loader.main at kernel/loader.rb:610
                     Object#__script__ at kernel/loader.rb:621

➜  rails git:(spastorino-master) cat /Users/santiago/.rvm/gems/rbx-head/gems/mysql-2.8.1/ext/mysql_api/gem_make.out
/Users/santiago/.rvm/rubies/rbx-head/bin/rbx extconf.rb 
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... no
checking for rb_thread_start_timer()... no
checking for mysql.h... 

➜  rails git:(spastorino-master) gem install mysql
Building native extensions.  This could take a while...
Successfully installed mysql-2.8.1
1 gem installed

➜  rails git:(spastorino-master) bundle update
...
Using mysql (2.8.1)