rubygems - Installing Bundle for Ruby -


i trying install bundle , keep on getting errors specific gems not being installed. example, byebug debugger not installed had install that, , eventmachine not installed, , json not installed install json , when run 

#bundle install

i still the:

an error occurred while installing json (1..7.7), , bundler cannot continue. make sure 'gem install json -v '1.7.7' succeeds before bundling

how can install bundle?

edit: gem install json -v '1.7.7' following error: new error message


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