Why am I not able to install JSON gem?

Question

I am getting Bundle Updated when I run bundle update
Json 1.8.6 is installed.
But when I run jekyll build, I get this error:

WARN: Unresolved specs during Gem::Specification.reset: listen (< 3.1, ~> 3.0) WARN: Clearing out unresolved specs. Please report a bug if this causes problems. /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.5/lib/bundler/runtime.rb:40:in block in setup': You have already activated json 2.0.2, but your Gemfile requires json 1.8.6. Prependingbundle exec` to your command may solve this. (Gem::LoadError)

As the warning suggest you can prepend bundle exec to your command — Deepak Mahakale
– Deepak Mahakale, Commented Feb 23, 2017 at 7:11

Deepak Mahakale · Accepted Answer · 2017-02-23 07:13:25Z

4

Seems like you have multiple versions of json installed and the wrong version is being used

Prepending bundle exec to your command may solve this.

As the warning suggest you can add bundle exec before your command. This will make sure to use the Gem versions mentioned in your Gemfile.

bundle exec jekyll build

and

bundle exec jekyll serve

answered Feb 23, 2017 at 7:13

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3 Comments

So, from now on, I can't use bundle serve? Always use exec? It works, though. Thanks.

bundle exec just ensure that the right version of gem will be used

@maximusdooku: alias j='bundle exec jekyll' - lets you "j serve". Much easier!