title: TypeError: glob pattern string required
body: <p>I'm trying to compile <code>sass</code> using <code>gulp-ruby-sass</code> but I'm getting <code>TypeError: glob pattern string required</code>.</p>
  
  <p>This is what my <code>gulpfile.js</code> looks like:</p>
  
  <pre><code>var gulp = require('gulp'),
      sass = require('gulp-ruby-sass');
  
  var paths = {
      sassSrcPath: ['Content/css/**/*.scss'],
      sassDestPath: ['build/css/'],
      sassImportsPath: ['Content/styleguide/']
  };
  
  // Styles Task
  gulp.task('styles', function () {
      gulp.src(paths.sassSrcPath)
          .pipe(sass({
              style: 'compressed',
              loadPath: [paths.sassImportsPath]
          }))
          .pipe(gulp.dest(paths.sassDestPath));
  });
  
  // Watch Task
  gulp.task('watch', function () {
      gulp.watch(paths.sassSrcPath, ['styles']);
  });
  
  gulp.task('default', ['styles', 'watch']);
  </code></pre>
  
  <p>Here is my folder structure:</p>
  
  <pre><code>├── Content
  │   ├── css
  │   │   ├── partials
  │   │   │   └─_icons.scss
  │   │   ├── main.css.scss
  │   │   └── styleguide.css.scss
  │   └── styleguide
  │       ├── css
  │       │   └─ vendor
  │       │      └─ // Bunch of other folders that contain .sass files
  │       └── // Other .sass files
  └── gulpfile.js
  </code></pre>
  
  <p>I'm fresh new to Gulp and I haven't used Grunt either so excuse me if I made a trivial mistake.</p>