`jekyll build` fails with "Unresolved specs ..." error

[plesiv]

When trying to get CppSamples-Web running locally I got:

WARN: Unresolved specs during Gem::Specification.reset:
      pygments.rb (~> 0.6.0)
      redcarpet (~> 3.1)
      listen (~> 2.7)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
Configuration file: /home/zoran/work/09-CppSamples-Web/_config.yml
jekyll 2.5.3 | Error:  nil is not a symbol

I've tried bundle update, bundle install and:

gem install pygments.rb -v 0.6.0
gem install redcarpet -v 3.1
gem install listen -v 2.7

both as regular user and as root. Nothing helped.

I'm not familiar with ruby and this might be trivial, I apologize in that case.

[sftrabbit]

Thanks. Will take a look at this soon.

[davidtaboas]

I had the same issue.

I resolved removing the olders versions of gems:

gem cleanup pygments.rb
gem cleanup redcarpet
gem cleanup listen

Note: Uninstall old versions of Ruby Gems - Stack Overflow