Сбой обновления пакета на ffi

Я пытаюсь выполнить пакетное обновлениев своем приложении rails, но получаю следующую ошибку:

Installing ffi (1.0.11) with native extensions Unfortunately, a fatal error has occurred. Please report this error to the Bundler issue tracker at https://github.com/carlhuda/bundler/issues so that we can fix it. Thanks!
/Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:552:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb 
checking for ffi.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/bin/ruby
    --with-ffi_c-dir
    --without-ffi_c-dir
    --with-ffi_c-include
    --without-ffi_c-include=${ffi_c-dir}/include
    --with-ffi_c-lib
    --without-ffi_c-lib=${ffi_c-dir}/lib
    --with-libffi-config
    --without-libffi-config
    --with-pkg-config
    --without-pkg-config
/Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:931:in `block in have_header'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:254:in `open'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:930:in `have_header'
    from extconf.rb:9:in `<main>'


Gem files will remain installed in /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/ffi-1.0.11 for inspection.
Results logged to /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/ffi-1.0.11/ext/ffi_c/gem_make.out
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:530:in `block in build_extensions'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:505:in `each'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:505:in `build_extensions'
    from /Users/Kyle/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:180:in `install'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/source.rb:90:in `block in install'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/rubygems_integration.rb:82:in `preserve_paths'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/source.rb:89:in `install'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/installer.rb:73:in `block in install_gem_from_spec'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/rubygems_integration.rb:97:in `with_build_args'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/installer.rb:72:in `install_gem_from_spec'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/installer.rb:56:in `block in run'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/installer.rb:55:in `run'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/installer.rb:12:in `install'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/cli.rb:271:in `update'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/vendor/thor/task.rb:22:in `run'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/vendor/thor.rb:263:in `dispatch'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/lib/bundler/vendor/thor/base.rb:386:in `start'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/gems/bundler-1.1.0/bin/bundle:13:in `<top (required)>'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/bin/bundle:19:in `load'
    from /Users/Kyle/.rvm/gems/ruby-1.9.3-p125/bin/bundle:19:in `<main>'

Есть идеи?