title: Cannot load variables or mixins using inline-style-loader
body: <p>I would like to use <code>twitter-bootstrap</code> with <code>inline-styles</code>, in order to do so, I have setup:</p>
  
  <pre><code>{
     test: /\.scss$/,
     loaders: ['raw', 'inline-style', 'autoprefixer?' + autoprefixerOptions, 'sass']
  }
  </code></pre>
  
  <p>I have installed <code>bootstrap-sass</code> and <code>radium</code> using npm. I wrote this code:</p>
  
  <pre><code>import normalize from 'radium-normalize'
  import m from '../node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_mixins.scss'
  import v from '../node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_variables.scss'
  import sc from '../node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_scaffolding.scss'
  import t from '../node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_type.scss'
  import buttons from '..//node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_buttons.scss'
  </code></pre>
  
  <p>I attempt to add these to the <code>Style</code> component provided by <code>radium</code> like this:</p>
  
  <pre><code>const baseRules = {...normalize, ...m, ...v, ...sc, ...type}
  const App = () =&gt; (
    &lt;div&gt;
      &lt;Style rules={baseRules} /&gt;
      &lt;HelloWorld /&gt;
    &lt;/div&gt;
  )
  </code></pre>
  
  <p>I get these errors informing me that variables and mixins were not defined:</p>
  
  <pre><code> ERROR in ./~/bootstrap-sass/assets/stylesheets/bootstrap/_scaffolding.scss
  Module build failed: 
    @include box-sizing(border-box);
            ^
        No mixin named box-sizing
  
  Backtrace:
      stdin:12
        in /home/vamsi/Do/webpack-npm-plugin/node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_scaffolding.scss (line 12, column 12)
   @ ./src/index.js 21:19-107
  
  ERROR in ./~/bootstrap-sass/assets/stylesheets/bootstrap/_type.scss
  Module build failed: 
    font-family: $headings-font-family;
                ^
        Undefined variable: "$headings-font-family".
        in /home/vamsi/Do/webpack-npm-plugin/node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_type.scss (line 11, column 16)
   @ ./src/index.js 25:12-93
  
  ERROR in ./~/bootstrap-sass/assets/stylesheets/bootstrap/_buttons.scss
  Module build failed: 
    font-weight: $btn-font-weight;
                ^
        Undefined variable: "$btn-font-weight".
        in /home/vamsi/Do/webpack-npm-plugin/node_modules/bootstrap-sass/assets/stylesheets/bootstrap/_buttons.scss (line 12, column 16)
   @ ./src/index.js 29:15-100
  </code></pre>