diff --git a/package.json b/package.json
index 74f8b06d1c..05bf5851a9 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,6 @@
     "ui/tournamentCalendar",
     "ui/tree",
     "ui/msg",
-    "ui/@build/jsProject",
     "ui/@build/rollupProject",
     "ui/@types/lichess"
   ]
diff --git a/ui/@build/jsProject/index.js b/ui/@build/jsProject/index.js
deleted file mode 100644
index 8e96abcb51..0000000000
--- a/ui/@build/jsProject/index.js
+++ /dev/null
@@ -1,52 +0,0 @@
-const gulp = require('gulp');
-const source = require('vinyl-source-stream');
-const buffer = require('vinyl-buffer');
-const colors = require('ansi-colors');
-const logger = require('fancy-log');
-const watchify = require('watchify');
-const browserify = require('browserify');
-const terser = require('gulp-terser');
-const size = require('gulp-size');
-
-module.exports = (standalone, fileBaseName, dir) => {
-
-  const browserifyOpts = (debug) => ({
-    entries: [`${dir}/src/main.js`],
-    sourceType: 'module',
-    standalone: standalone,
-    debug: debug
-  });
-  const destination = () => gulp.dest('../../public/compiled/');
-
-  const prod = () => browserify(browserifyOpts(false))
-    .bundle()
-    .pipe(source(`${fileBaseName}.min.js`))
-    .pipe(buffer())
-    .pipe(terser({safari10: true}))
-    .pipe(size())
-    .pipe(destination());
-
-  const dev = () => browserify(browserifyOpts(true))
-    .bundle()
-    .pipe(source(`${fileBaseName}.js`))
-    .pipe(destination());
-
-  const watch = () => {
-
-    const bundle = () => bundler
-      .bundle()
-      .on('error', error => logger.error(colors.red(error.message)))
-      .pipe(source(`${fileBaseName}.js`))
-      .pipe(destination());
-
-    const bundler = watchify(
-      browserify(Object.assign({}, watchify.args, browserifyOpts(true)))
-    ).on('update', bundle).on('log', logger.info);
-
-    return bundle();
-  };
-
-  gulp.task('prod', prod);
-  gulp.task('dev', dev);
-  gulp.task('default', watch);
-};
diff --git a/ui/@build/jsProject/package.json b/ui/@build/jsProject/package.json
deleted file mode 100644
index a4b4f3f230..0000000000
--- a/ui/@build/jsProject/package.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "name": "@build/jsProject",
-  "version": "2.0.0",
-  "private": true,
-  "author": "Thibault Duplessis",
-  "license": "AGPL-3.0-or-later",
-  "main": "index.js",
-  "dependencies": {
-    "gulp": "^4",
-    "vinyl-source-stream": "^2",
-    "vinyl-buffer": "^1",
-    "ansi-colors": "^1",
-    "fancy-log": "^1",
-    "watchify": "^3",
-    "browserify": "^16",
-    "gulp-terser": "^1",
-    "gulp-size": "^3"
-  }
-}