title: Why is gulp-sass not creating output
body: <p>I'm trying to get gulp to compile some sass, however I can't seem to get it to write out anything. I'm not seeing an error and using sass to compile myself is successful. Here is what my config looks like:</p>
  
  <pre><code>var sass = require('gulp-sass');
  var baseOutputDir = '../publish/homepage';
  var cssOutputDir = baseOutputDir + '/css';
  gulp.task('sass', function () {
      gulp.src(['./css-lib/Bootstrap/3.3.1/assets/stylesheets/_bootstrap.scss'])
          .pipe(sass())
          .on('error', function (err) { console.log(err.message); })
          .pipe(gulp.dest(cssOutputDir));
  })
  </code></pre>
  
  <p>The bootstrap is a clone of <a href="https://github.com/twbs/bootstrap-sass">https://github.com/twbs/bootstrap-sass</a></p>