diff --git a/packages/kbn-ui-shared-deps/webpack.config.js b/packages/kbn-ui-shared-deps/webpack.config.js
index 438b1e0b2e77..9d18c8033ff6 100644
--- a/packages/kbn-ui-shared-deps/webpack.config.js
+++ b/packages/kbn-ui-shared-deps/webpack.config.js
@@ -7,7 +7,6 @@
  */
 
 const Path = require('path');
-const Os = require('os');
 
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
 const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
@@ -31,7 +30,8 @@ module.exports = {
     'kbn-ui-shared-deps.v8.light': ['@elastic/eui/dist/eui_theme_amsterdam_light.css'],
   },
   context: __dirname,
-  devtool: 'cheap-source-map',
+  // cheap-source-map should be used if needed
+  devtool: false,
   output: {
     path: UiSharedDeps.distDir,
     filename: '[name].js',
@@ -39,7 +39,6 @@ module.exports = {
     devtoolModuleFilenameTemplate: (info) =>
       `kbn-ui-shared-deps/${Path.relative(REPO_ROOT, info.absoluteResourcePath)}`,
     library: '__kbnSharedDeps__',
-    futureEmitAssets: true,
   },
 
   module: {
@@ -111,7 +110,7 @@ module.exports = {
   optimization: {
     minimizer: [
       new CssMinimizerPlugin({
-        parallel: Math.min(Os.cpus().length, 2),
+        parallel: false,
         minimizerOptions: {
           preset: [
             'default',
@@ -125,7 +124,7 @@ module.exports = {
         cache: false,
         sourceMap: false,
         extractComments: false,
-        parallel: Math.min(Os.cpus().length, 2),
+        parallel: false,
         terserOptions: {
           compress: true,
           mangle: true,