javascript - Gulp task is not working -


i want minify , rename .css in folder (../dist/css), says there's error (you can see error in screenshot below).

var gulp =         require('gulp'); var postcss =      require('gulp-postcss'); var autoprefixer = require('autoprefixer'); var lost =         require('lost'); var rucksack =     require('rucksack-css'); 
var cssnano =      require('cssnano'); var rename =       require('gulp-rename'); 
gulp.task('css', function() {     var plugins = [             autoprefixer({                 browsers: ['last 2 version']             }),             rucksack({                 quantityqueries: false,                 alias: false,                 easings: false,                 inputpseudo: false             }),             lost     ];     return gulp.src('app/styles/**/*.css')         .pipe(postcss(plugins))         .pipe(gulp.dest('dist/css')); });

//========this part not working============

 gulp.task('css-min', ['css'], function() {   return gulp.src('app/styles/*.css')       .pipe(cssnano())       .pipe(rename({suffix: '.min'}))       .pipe(gulp.dest('dist/css')); }); 
gulp.task('watch', ['css', 'css-min'], function() {         gulp.watch('app/styles/**/*.css', ['css']); });   gulp.task('default', ['watch']);

enter image description here


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