Json vs json_pure, which is default

Ruby
1

Here is the snapshot of gem list in my system

jmespath (1.4.0)

json (default: 2.1.0)
json_pure (2.2.0)

mini_portile2 (2.4.0)

Issue: json is not getting installed via bundler. Hence I used json_pure and gave the same in Gemfile

But by default, it is again installing json and failing

How to make json_pure default?

3

Anybody faced this issue? Please help

4

one or the other not both. comment out the json line