Fetching: liquid-2.6.3.gem (100%)
Fetching: kramdown-1.13.2.gem (100%)
Fetching: mercenary-0.3.6.gem (100%)
Fetching: safe_yaml-1.0.4.gem (100%)
Fetching: colorator-0.1.gem (100%)
Fetching: yajl-ruby-1.2.1.gem (100%)
Building native extensions. This could take a while...
Fetching: posix-spawn-0.3.13.gem (100%)
Building native extensions. This could take a while...
Fetching: pygments.rb-0.6.3.gem (100%)
Fetching: redcarpet-3.4.0.gem (100%)
Building native extensions. This could take a while...
Fetching: blankslate-2.1.2.4.gem (100%)
Fetching: parslet-1.5.0.gem (100%)
Fetching: toml-0.1.2.gem (100%)
Fetching: jekyll-paginate-1.1.0.gem (100%)
Fetching: multipart-post-2.0.0.gem (100%)
Fetching: faraday-0.11.0.gem (100%)
Fetching: public_suffix-2.0.5.gem (100%)
ERROR: Error installing jekyll:
public_suffix requires Ruby version >= 2.0.