おうちNetBSD 8.0 RC1
$ cat Gemfile
source 'https://rubygems.org'
ruby '>= 2.3.0', '< 2.6.0'
gem 'ffi'
$ bundle install --path=vendor/bundle
Fetching gem metadata from https://rubygems.org/..........
Resolving dependencies...
Using bundler 1.16.2
Fetching ffi 1.9.25
Installing ffi 1.9.25 with native extensions
Bundle complete! 1 Gemfile dependency, 2 gems now installed.
Bundled gems are installed into `./vendor/bundle`