gistfile1.txt

[rundeck@sandbox-rundeck002iad rundeck-wizard]$ sudo gem install chef -v 12.5.1
Successfully installed chef-12.5.1
Parsing documentation for chef-12.5.1
Installing ri documentation for chef-12.5.1
1 gem installed
[rundeck@sandbox-rundeck002iad rundeck-wizard]$ cat Gemfile 
source 'https://rubygems.org'

gem 'chef', '12.5.1'

[rundeck@sandbox-rundeck002iad rundeck-wizard]$ bundle install
Fetching gem metadata from https://rubygems.org/.........
Fetching version metadata from https://rubygems.org/..
Resolving dependencies...
Rubygems 2.0.14 is not threadsafe, so your gems will be installed one at a time. Upgrade to Rubygems 2.1.0 or higher to enable parallel gem installation.
Using builder 3.2.2
Using mixlib-config 2.2.1
Using mixlib-shellout 2.2.6
Using libyajl2 1.2.0
Using hashie 3.4.3
Using mixlib-log 1.6.0
Using rack 1.6.4
Using uuidtools 2.1.5
Using diff-lcs 1.2.5
Using erubis 2.7.0
Using highline 1.7.8
Using rspec-support 3.4.1
Using mixlib-cli 1.5.0
Using net-ssh 2.9.4
Using ffi 1.9.10
Using ipaddress 0.8.3
Using plist 3.1.0
Using systemu 2.6.5
Using wmi-lite 1.0.0
Using coderay 1.1.1
Using method_source 0.8.2
Using slop 3.6.0
Using multi_json 1.11.3
Using net-telnet 0.1.1
Using sfl 2.2
Using syslog-logger 1.6.8
Using bundler 1.11.2
Using chef-config 12.5.1
Using ffi-yajl 2.2.3
Using rspec-core 3.4.4
Using rspec-expectations 3.4.0
Using rspec-mocks 3.4.1
Using net-ssh-gateway 1.2.0
Using net-scp 1.2.1
Using pry 0.10.3
Installing chef-zero 4.6.1

Gem::InstallError: chef-zero requires Ruby version >= 2.1.0.
Using ohai 8.15.1
Using rspec_junit_formatter 0.2.3
Using rspec-its 1.2.0
Using mixlib-authentication 1.4.0
Using rspec 3.4.0
Using net-ssh-multi 1.2.1
Using specinfra 2.57.0
An error occurred while installing chef-zero (4.6.1), and Bundler cannot continue.
Make sure that `gem install chef-zero -v '4.6.1'` succeeds before bundling.