Error in `jekyll serve` and `jekyll build`

[Shuvomoy]

jekyll serve or jekyll build is giving me the following errors:

/var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/spec_set.rb:92:in `block in materialize': Could not find celluloid-0.16.1 in any of the sources (Bundler::GemNotFound)
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/spec_set.rb:85:in `map!'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/spec_set.rb:85:in `materialize'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/definition.rb:140:in `specs'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/definition.rb:185:in `specs_for'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/definition.rb:174:in `requested_specs'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/environment.rb:18:in `requested_specs'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler/runtime.rb:13:in `setup'
    from /var/lib/gems/1.9.1/gems/bundler-1.10.6/lib/bundler.rb:127:in `setup'
    from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:37:in `require_from_bundler'
    from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/bin/jekyll:16:in `<top (required)>'
    from /usr/local/bin/jekyll:23:in `load'
    from /usr/local/bin/jekyll:23:in `<main>'

[clayh53]

This looks like some murky Ruby version mismatch thing. I have no build issues and am running Ruby-2.2.0 using RVM.

[clayh53]

Some necessary bundles were yanked and are no longer available.

Fix by running bundle update celluloid from the terminal

see this discussion for more

[diogocapela]

Fixed by running bundle.