Gulp watch with LiveReload

gulpfile.js

var gulp = require('gulp'),
    compress = require('gulp-uglify'),
    stylus = require('gulp-stylus'),
    concat = require('gulp-concat'),
    browserify = require('gulp-browserify'),
    livereload = require('gulp-livereload');

var liveReloadServer = livereload();

gulp.task('styles', function() {
    gulp.src('./styles/index.styl')
        .pipe(stylus({
            compress: true
        }))
        .pipe(gulp.dest('./styles'))
        .pipe(livereload())
});

gulp.task('build', function() {

    gulp.src(['./scripts/app.js'])
        .pipe(browserify({
          debug : false
        }))
        //.pipe(compress())
        .pipe(concat('../build/app.browser.js'))
        .pipe(gulp.dest('./scripts'))
        .pipe(livereload())
});

//Works well with this https://chrome.google.com/webstore/detail/livereload/jnihajbhpnppcggbcgedagnkighmdlei

gulp.task('watch', function() {
    gulp.watch(['./styles/**/*.styl'], ['styles']);
    gulp.watch(['./scripts/**/*.js'], ['build']);
});

gulp.task('default', ['styles', 'build', 'watch']);