I'm just started to use Gulp to improve my workflow. I'm currently have a task called styles that compiles .less files, and a task called watch, to watch for changes in any .less file and, then, run styles task. My gulpfile.js contains this code:

var gulp = require( 'gulp' ),

        less = require( 'gulp-less' ),

        autoprefixer = require( 'gulp-autoprefixer' ),

        minifycss = require( 'gulp-minify-css' ),

        jshint = require( 'gulp-jshint' ),

        uglify = require( 'gulp-uglify' ),

        imagemin = require( 'gulp-imagemin' ),

        rename = require( 'gulp-rename' ),

        clean = require( 'gulp-clean' ),

        concat = require( 'gulp-concat' ),

        notify = require( 'gulp-notify' ),

        cache = require( 'gulp-cache' ),

        header = require( 'gulp-header' ),

        footer = require( 'gulp-footer' );



// styles task

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

    return gulp.src( 'src/styles/main.less' )

        .pipe( less({ paths: ['src/styles/'] }) )

        .pipe( autoprefixer( 'last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4' ) )

        .pipe( gulp.dest( 'dist/assets/css' ) )

        .pipe( rename( 'main.min.css' ) )

        .pipe( minifycss() )

        .pipe( gulp.dest( 'dist/assets/css' ) )

        .pipe( notify({ message: 'Styles task complete' }) );

} )



(...)



// watch task

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



    // Watch .less files

    gulp.watch('src/styles/**/*.less', function(event) {

        console.log('File ' + event.path + ' was ' + event.type + ', running tasks...');

        gulp.run('styles');

    });

});

The problem is, when I run gulp watch, it starts the task and runs the styles task on the first time that I change a .less file. After the first time, I only got the message logged (File X was changed, running tasks...). Am I doing something wrong?

Thanks for any hint or help!

EDIT

Just some information as requested: I'm running Node.js 0.10.24 with Gulp 3.4.0. Here is a screenshot of the prompt output: