title: Bootstrap 4 beta using rubygem doesn't work with Jekyll
body: <p>I just start using Jekyll recently for my personal project.</p>
  
  <p>I'm using <code>Jekyll-assets</code> together with <code>gem 'bootstrap-sass';</code> and everything works with charm.</p>
  
  <p>This is what my main.css.scss look like:</p>
  
  <pre><code>@import '_sass/variables';
  @import '_sass/scaffolding';
  @import 'bootstrap-sprockets';
  @import 'bootstrap';
  @import 'font-awesome-sprockets';
  @import 'font-awesome';
  </code></pre>
  
  <p>Everything works when I run jekyll serve.
  However, when I try to use the latest beta version,
  I got this error when I try to run <code>Jekyll Serve</code></p>
  
  <pre><code>Incremental build: disabled. Enable with --incremental
    Generating...
  Error in _assets/css/main.scss:7 File to import not found or unreadable: bootstrap.
  Load paths:
  /Users/MacBookPro/.rvm/gems/ruby-2.3.0/gems/font-awesome-sass-4.7.0/assets/stylesheets
  /Users/MacBookPro/.rvm/gems/ruby-2.3.0/gems/font-awesome-sass-4.7.0/assets/fonts
  </code></pre>
  
  <p>I commented out the <code>@import 'bootstrap-sprockets.</code>
  It seems that <code>Jekyll-assets</code> does not found the bootstrap path.
  I've already follow the step-by-step guide as stated in the documentation at [<a href="https://github.com/twbs/bootstrap-rubygem][1]" rel="nofollow noreferrer">https://github.com/twbs/bootstrap-rubygem][1]</a></p>
  
  <p>Currently I'm not using any package manager such as npm,yarn etc. Any help?</p>