     .pipe filter isOrphan
     .pipe clean()
 
+# NOTE: gulp-stylus doesn't report fileName on error. Waiting for Gulp 4.
 gulp.task 'stylus', ->
   streams = paths.stylus.map (stylusPath) ->
     gulp.src stylusPath, base: '.'

      .pipe cond args.stage, minifyCss()
      .pipe gulp.dest '.'
  eventStream.merge streams...
  # TODO(steida): Ensure watch isn't stopped on error. Waiting for Gulp 4
  # github.com/gulpjs/gulp/issues/258.
  return


    .pipe coffee2closure()
    .pipe gulp.dest '.'

# NOTE: gulp-react doesn't report fileName on error. Waiting for Gulp 4.
gulp.task 'react', ->
  gulp.src changedFilePath ? paths.react, base: '.'
    .pipe plumber()
    .pipe react harmony: true
    .on 'error', (err) -> gutil.log err.message
    .pipe gulp.dest '.'

gulp.task 'deps', ->
