multiple source for using gulpjs to build css files with Sass, Stylus, Pure CSS

gulpfile.ls

require <[ gulp gulp-util gulp-concat gulp-stylus gulp-ruby-sass streamqueue]>

gulp.task 'styles' ->
  stream = streamqueue object-mode: true
  stream.queue gulp.src "#src-path/styles/**/*.sass" .pipe gulp-ruby-sass!
  stream.queue gulp.src "#src-path/styles/**/*.styl" .pipe gulp-stylus!
  stream.queue gulp.src "#src-path/styles/**/*.css"
  stream.done!
    .pipe gulp-concat 'all.css'
    .pipe gulp.dest "#{dest-path}/styles"

gulp.task 'default' <[styles]>