Folder getting excluded after building solution
<p>Trying to build a mobile application using ionic2 and angular2 / typescript in Visual Studio 2015 Community edition. gulp is being used to automate the build process. Now when I run the project the folder css is getting excluded from the project and so my css file is 404-ed. The issue as I see it is with the below code. </p>

<pre><code>var buildSass = require('ionic-gulp-sass-build');
//code omitted
gulp.task('build', ['clean'], function(done) {
    runSequence(
        //code omitted
    );
});

gulp.task('clean', function() {
    return del('www/build');
}); 
</code></pre>

<p>the build folder is deleted and re-added and so it gets excluded from the project. Is that assumption correct? If so, whats a workaround for this issue?</p>