[destus]

Walk,

gulp.task('scss:web', function(){
  return gulp.src('web/theme/sass/style.scss')
   .pipe(scss(
   ).on('error', scss.logError))
   .pipe(gulp.dest('web/theme/css'));
});

gulp.task('scss:admin', function(){
  return gulp.src('admin/sass/style.scss')
   .pipe(scss(
   ).on('error', scss.logError))
   .pipe(gulp.dest('admin/css'));
});

gulp.task('default',function(){
  gulp.watch('web/theme/sass/**/*.scss', ['scss:web']);
  gulp.watch('admin/sass/**/*.scss', ['scss:admin']);
});