NetBeans doesn't scan external changes after gulp task

I use NetBeans to develop and I actually use a remote server to test. So far it worked the "external file changes". Now I use a gulp task to generate a site.css from a site.scss using the gulp-ruby-sass like this:

gulp.src("site.scss")
.pipe(sass(sassOptions))
//...
.pipe(gulp.dest("/css"));

After the sass compiler finishes I expect that NetBeans detects the new file (or the modified file) and upload to the remote server.

I think the sass process keep the file and the OS isn't notified of the changes.

Can u help me please? Thanks in advance