bundler で各種gemをインストールしようとすると失敗する $ bundle install --path vendor/bundle Fetching gem metadata from https://rubygems.org/.......... Fetching additional metadata from https://rubygems.org/.. Resolving dependencies... Using rake 10.2.2 Using i18n 0.6.9 Using minitest 4.7.5 Using multi_json 1.9.2 Using thread_safe 0.3.3 Using tzinfo 0.3.39 Using activesupport 4.0.2 Using builder 3.1.4 Using erubis 2.7.