gulp.task("css:build", function () {
return gulp.src(path.src.css)
    .pipe(plumber())
    .pipe(sass())
    .pipe(autoprefixer({
        browsers: ["last 5 versions"],
        cascade: true
    }))
    .pipe(removeComments())
    .pipe(cssbeautify())
    .pipe(gulp.dest(path.build.css))
    .pipe(cssnano({
        zindex: false,
        discardComments: {
            removeAll: true
        }
    }))
    .pipe(rename("style.min.css"))
    .pipe(gulp.dest(path.build.css))
    .pipe(webserver.reload({stream: true}));
});