diff --git a/packages/language-select/karma.conf.js b/packages/language-select/karma.conf.js
index 901e07806c448e53fd84367917e67267a1836771..6a646f5ec9ea5a6c50dd25dc6038dd94fff1bc43 100644
--- a/packages/language-select/karma.conf.js
+++ b/packages/language-select/karma.conf.js
@@ -6,7 +6,7 @@ module.exports = function(config) {
     basePath: 'dist',
     frameworks: ['mocha', 'chai'],
     files: [
-      './bundle.js',
+      {pattern: './*.js', included: true, watched: true, served: true, type: 'module'},
       {pattern: './**/*', included: false, watched: true, served: true},
     ],
     autoWatch: true,
diff --git a/packages/language-select/package.json b/packages/language-select/package.json
index fe8abde0762de4cbdc5f385e9cf9e2e51aa5795f..db13c3dfddbc7361f85d9a5c7b159ea35c857d98 100644
--- a/packages/language-select/package.json
+++ b/packages/language-select/package.json
@@ -13,12 +13,12 @@
     "chai": "^4.2.0",
     "rollup": "^1.19.4",
     "rollup-plugin-commonjs": "^10.0.2",
+    "rollup-plugin-consts": "^1.0.1",
     "rollup-plugin-copy": "^3.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-serve": "^1.0.1",
     "rollup-plugin-terser": "^5.1.1",
     "rollup-plugin-json": "^4.0.0",
-    "rollup-plugin-replace": "^2.2.0",
     "rollup-plugin-multi-entry": "^2.1.0",
     "i18next-scanner": "^2.10.2",
     "vpu-common": "file:./vendor/common"
diff --git a/packages/language-select/rollup.config.js b/packages/language-select/rollup.config.js
index 674946cf936b2b803ca9dd9c3e772f4f9803fb3c..9de7bfa684e409913b939b5e4f23797634dadfc8 100644
--- a/packages/language-select/rollup.config.js
+++ b/packages/language-select/rollup.config.js
@@ -4,9 +4,9 @@ import commonjs from 'rollup-plugin-commonjs';
 import copy from 'rollup-plugin-copy';
 import {terser} from "rollup-plugin-terser";
 import json from 'rollup-plugin-json';
-import replace from "rollup-plugin-replace";
 import serve from 'rollup-plugin-serve';
 import multiEntry from 'rollup-plugin-multi-entry';
+import consts from 'rollup-plugin-consts';
 
 const build = (typeof process.env.BUILD !== 'undefined') ? process.env.BUILD : 'local';
 console.log("build: " + build);
@@ -19,6 +19,9 @@ export default {
     },
     plugins: [
         multiEntry(),
+        consts({
+            environment: build,
+        }),
         resolve({
           customResolveOptions: {
             // ignore node_modules from vendored packages
@@ -29,9 +32,6 @@ export default {
             include: 'node_modules/**'
         }),
         json(),
-        replace({
-            "process.env.BUILD": '"' + build + '"',
-        }),
         (build !== 'local' && build !== 'test') ? terser() : false,
         copy({
             targets: [
diff --git a/packages/language-select/vendor/common b/packages/language-select/vendor/common
index 8a80921c5f8ea2b0d1a0a548741d2ca1716a5139..f65096b99b737a046d07ad6616eec31788850422 160000
--- a/packages/language-select/vendor/common
+++ b/packages/language-select/vendor/common
@@ -1 +1 @@
-Subproject commit 8a80921c5f8ea2b0d1a0a548741d2ca1716a5139
+Subproject commit f65096b99b737a046d07ad6616eec31788850422