Как выгрузить webp в отдельный файл (Gulp)

Вопрос следующий: как выгружать готовые файлы webp в ту же папку img, только в ней создать отдельную папку для этого формата? Сейчас просто выгружаются в папку img.

let project_folder = "dist";
let source_folder = "#src";

let fs = require('fs');

let path = {
    build: {
        html: project_folder + "/",
        css: project_folder + "/css/",
        js: project_folder + "/js/",
        img: project_folder + "/img/",
        fonts: project_folder + "/fonts/",
    },
    src: {
        html: [source_folder + "/*.html", "!" + source_folder + "/_*.html"],
        css: source_folder + "/scss/style.scss",
        js: source_folder + "/js/script.js",
        img: source_folder + "/img/**/*.{jpg,png,svg,gif,ico,webp}",
        fonts: source_folder + "/fonts/*.ttf",
    },
    watch: {
        html: source_folder + "/**/*.html",
        css: source_folder + "/scss/**/*.scss",
        js: source_folder + "/js/**/*.js",
        img: source_folder + "/img/**/*.{jpg,png,svg,gif,ico,webp}"
    },
    clean: "./" + project_folder + "/"
}

let { src, dest } = require('gulp'),
    gulp = require('gulp'),
    browsersync = require("browser-sync").create(),
    fileinclude = require("gulp-file-include"),
    del = require("del"),
    scss = require("gulp-sass"),
    autoprefixer = require("gulp-autoprefixer"),
    group_media = require("gulp-group-css-media-queries"),
    clean_css = require("gulp-clean-css"),
    rename = require("gulp-rename"),
    uglify = require("gulp-uglify-es").default,
    imagemin = require("gulp-imagemin"),
    webp = require("gulp-webp"),
    webphtml = require("gulp-webp-html"),
    svgSprite = require("gulp-svg-sprite"),
    ttf2woff = require("gulp-ttf2woff"),
    ttf2woff2 = require("gulp-ttf2woff2"),
    fonter = require("gulp-fonter");

function browserSync(params) {
    browsersync.init({
        server: {
            baseDir: "./" + project_folder + "/"
        },
        port: 3000,
        notify: false
    })
}

function html() {
    return src(path.src.html)
        .pipe(fileinclude())
        .pipe(webphtml())
        .pipe(dest(path.build.html))
        .pipe(browsersync.stream())
}

function css() {
    return src(path.src.css)
        .pipe(
            scss({
                outputStyle: "expanded"//компиляция кода в нормальный
            })
        )
        .pipe(
            group_media()
        )
        .pipe(
            autoprefixer({
                overrideBrowserslist: ["last 5 versions"],
                cascade: true
            })
        )
        .pipe(dest(path.build.css))
        .pipe(clean_css())
        .pipe(
            rename({
                extname: ".min.css"
            })
        )
        .pipe(dest(path.build.css))
        .pipe(browsersync.stream())
}

function js() {
    return src(path.src.js)
        .pipe(fileinclude())
        .pipe(dest(path.build.js))
        .pipe(
            uglify()
        )
        .pipe(
            rename({
                extname: ".min.js"
            })
        )
        .pipe(dest(path.build.js))
        .pipe(browsersync.stream())
}

function images() {
    return src(path.src.img)
        .pipe(
            webp({
                quality: 100 // качество изображений в %
            })
        )
        .pipe(dest(path.build.img))
        .pipe(src(path.src.img))
        .pipe(
            imagemin({
                progressive: true,
                svgoPlugins: [{ removeViewBox: false }],
                interlaced: true,
                optimizationLevel: 7 // 0 to 7
            })
        )
        .pipe(dest(path.build.img))
        .pipe(browsersync.stream())
}

function fonts() {
    src(path.src.fonts)
        .pipe(ttf2woff())
        .pipe(dest(path.build.fonts));
    return src(path.src.fonts)
        .pipe(ttf2woff2())
        .pipe(dest(path.build.fonts));
}

gulp.task('otf2ttf', function () {//запускаем отдельно gulp otf2ttf
    return gulp.src([source_folder + '/fonts/*.otf'])
        .pipe(fonter({
            formats: ['ttf']
        }))
        .pipe(dest(source_folder + '/fonts/'));
})

gulp.task('svgSprite', function () {//gulp svgSprite вызов функции в терминале
    return gulp.src([source_folder + '/iconsprite/*.svg'])//iconsprite название папки
        .pipe(svgSprite({
            mode: {
                stack: {
                    sprite: "../icons/icons.svg", //папка и название файда куда будет выгружать
                    example: true //показывает код в html можно брать как пример
                }
            },
        }
        ))
        .pipe(dest(path.build.img))
})

function fontsStyle(params) {
    let file_content = fs.readFileSync(source_folder + '/scss/fonts.scss');
    return new Promise(function (resolve, reject) {
        if (file_content == '') {
            fs.writeFile(source_folder + '/scss/fonts.scss', '', cb);
            return fs.readdir(path.build.fonts, function (err, items) {
                if (items) {
                    let c_fontname;
                    for (var i = 0; i < items.length; i++) {
                        let fontname = items[i].split('.');
                        fontname = fontname[0];
                        if (c_fontname != fontname) {
                            fs.appendFile(source_folder + '/scss/fonts.scss', '@include font("' + fontname + '", "' + fontname + '", "400", "normal");\r\n', cb);
                        }
                        c_fontname = fontname;
                    }
                }
            })
        }
        resolve();
    });
}

function cb() {

}

function watchFiles(params) {
    gulp.watch([path.watch.html], html);
    gulp.watch([path.watch.css], css);
    gulp.watch([path.watch.js], js);
    gulp.watch([path.watch.img], images);
}

function clean(params) {
    return del(path.clean);
}

let build = gulp.series(clean, gulp.parallel(js, css, html, images, fonts, fontsStyle));
let watch = gulp.parallel(build, watchFiles, browserSync);

exports.fontsStyle = fontsStyle;
exports.fonts = fonts;
exports.images = images;
exports.js = js;
exports.css = css;
exports.html = html;
exports.build = build;
exports.watch = watch;
exports.default = watch;