diff --git a/package.json b/package.json
index 5be6d3dc98..87435ca257 100644
--- a/package.json
+++ b/package.json
@@ -54,10 +54,8 @@
     "ui/tournamentCalendar",
     "ui/tree",
     "ui/msg",
-    "ui/@build/cssProject",
     "ui/@build/jsProject",
     "ui/@build/tsProject",
-    "ui/@build/tsPlugins",
     "ui/@build/rollupProject",
     "ui/@types/lichess"
   ]
diff --git a/ui/@build/tsPlugins/index.js b/ui/@build/tsPlugins/index.js
deleted file mode 100644
index ab8e4c812d..0000000000
--- a/ui/@build/tsPlugins/index.js
+++ /dev/null
@@ -1,50 +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');
-const tsify = require('tsify');
-
-module.exports = (plugins) => {
-
-  const destination = () => gulp.dest(`../../public/compiled/`);
-
-  const mainProd = gulp.task('prod');
-
-  const pluginsProd = plugins.map(opts => {
-    return () => browserify(opts)
-      .plugin(tsify)
-      .bundle()
-      .pipe(source(opts.target))
-      .pipe(buffer())
-      .pipe(terser({safari10: true}))
-      .pipe(size())
-      .pipe(destination());
-  });
-
-  gulp.task('prod', gulp.series(pluginsProd.concat(mainProd)));
-
-  const pluginWatch = (opts) => () => {
-
-    const bundle = () => bundler
-      .bundle()
-      .on('error', error => logger.error(colors.red(error.message)))
-      .pipe(source(opts.target))
-      .pipe(destination());
-
-    const bundler = watchify(
-      browserify(Object.assign({}, watchify.args, {...opts, debug: true}))
-      .plugin(tsify)
-    ).on('update', bundle).on('log', logger.info);
-
-    return bundle();
-  };
-
-  plugins.map(plugin => {
-    gulp.task(plugin.standalone, pluginWatch(plugin));
-  });
-}
diff --git a/ui/@build/tsPlugins/package.json b/ui/@build/tsPlugins/package.json
deleted file mode 100644
index 7e0d8e4372..0000000000
--- a/ui/@build/tsPlugins/package.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "name": "@build/tsPlugins",
-  "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",
-    "tsify": "^4",
-    "typescript": "^3"
-  }
-}