title: Foundation build error
body: <p>Cannon find the solution for a long period of time. When I use foundation watch everything is great, but every time I try to use foundation build I see this error:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>[21:05:45] 'sass' errored after 5.91 s
  [21:05:45] Error in plugin 'gulp-uncss'
  Message:
      Unexpected EOF
  Details:
      domainEmitter: [object Object]
      domain: [object Object]
      domainThrown: false
  [21:05:45] 'build' errored after 6.31 s
  [21:05:45] 'default' errored after 6.31 s
  Error: foundation-emails-template@1.0.0 build: `gulp --production`
  Exit status 1
      at EventEmitter.&lt;anonymous&gt; (/usr/local/lib/node_modules/foundation-cli/node_modules/npm/lib/utils/lifecycle.js:217:16)
      at emitTwo (events.js:106:13)
      at EventEmitter.emit (events.js:194:7)
      at ChildProcess.&lt;anonymous&gt; (/usr/local/lib/node_modules/foundation-cli/node_modules/npm/lib/utils/spawn.js:24:14)
      at emitTwo (events.js:106:13)
      at ChildProcess.emit (events.js:194:7)
      at maybeClose (internal/child_process.js:899:16)
      at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)</code></pre>
  </div>
  </div>
  </p>
  
  <p>I also tried to delete the folder node_modules and install it again but nothing helps. How to fix it?</p>