# Rails 3: bundle install vendor - ffi 0.5.4 gem crashes : ERROR: Failed to build gem native extensio

**URL:** <https://www.ruby-forum.com/t/rails-3-bundle-install-vendor-ffi-0-5-4-gem-crashes-error-failed-to-build-gem-native-extensio/183069>\
**Category:** Rails\
**Created:** [February 7, 2010, 2:14pm UTC](https://www.ruby-forum.com/t/rails-3-bundle-install-vendor-ffi-0-5-4-gem-crashes-error-failed-to-build-gem-native-extensio/183069 "2010-02-07T14:14:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Kristian](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/e8c25b/32.png) [@Kristian](https://www.ruby-forum.com/u/Kristian)\
**Post date:** [February 7, 2010, 2:14pm UTC](https://www.ruby-forum.com/t/rails-3-bundle-install-vendor-ffi-0-5-4-gem-crashes-error-failed-to-build-gem-native-extensio/183069/1 "2010-02-07T14:14:59Z")

</div>

Installing ffi (0.5.4) from rubygems repository at [http://gemcutter.org](http://gemcutter.org)  
with native extensions /usr/local/Cellar/ruby/1.9.1-p378/lib/ruby/  
site\_ruby/1.9.1/rubygems/installer.rb:504:in `rescue in block in  
build\_extensions’: ERROR: Failed to build gem native extension.  
(Gem::Installer::ExtensionBuildError)

rake RUBYARCHDIR=/Users/kristianconsult/my\_rails/rails3\_apps/demo\_app/  
vendor/gems/ffi-0.5.4/lib RUBYLIBDIR=/Users/kristianconsult/my\_rails/  
rails3\_apps/demo\_app/vendor/gems/ffi-0.5.4/lib  
/usr/local/Cellar/ruby/1.9.1-p378/lib/ruby/site\_ruby/1.9.1/rubygems.rb:  
827:in `report_activate_error': Could not find RubyGem rake (>= 0) (Gem::LoadError) from /usr/local/Cellar/ruby/1.9.1-p378/lib/ruby/site_ruby/1.9.1/ rubygems.rb:261:in `activate’  
from /usr/local/Cellar/ruby/1.9.1-p378/lib/ruby/site\_ruby/1.9.1/  
rubygems.rb:68:in `gem' from <internal:gem_prelude>:273:in `push\_gem\_version\_on\_load\_path’  
from internal:gem\_prelude:14:in `gem' from /usr/local/bin/rake:18:in `’

How can I resolve this?

## Gemfile

git “git://github.com/rails/arel.git”  
git “git://github.com/rails/arel.git”  
git “git://github.com/rails/rack.git”  
git “git://github.com/rspec/rspec.git”  
git “git://github.com/negonicrac/rspec-rails.git”  
git “git://github.com/kristianmandrup/cucumber-rails.git”

gem “rails”, “3.0.0.beta1”, :git =\> “git://github.com/rails/rails.git”

source :gemcutter  
source “[http://gems.github.com](http://gems.github.com)”

## gem “sqlite3-ruby” gem “rspec-rails”, “2.0.0.a4” gem “rspec”, “2.0.0.a4” gem ‘database\_cleaner’, ‘\>=0.4.3’ gem ‘capybara’, ‘\>=0.3.0’ gem ‘cucumber’ gem ‘cucumber-rails’, ‘0.2.5’ gem “webrat”

Thanks 🙂