user vagrant can not run cucumber tests

[gnuhub]

/usr/bin/ruby2.1 -I "/root/.gem/ruby/2.1.0/gems/cucumber-1.3.16/lib:lib" "/root/.gem/ruby/2.1.0/gems/cucumber-1.3.16/bin/cucumber"

[gnuhub]

• destroy and build the system again to fix this issue
• this is caused the previous ruby version installed by rbenv