diff --git a/website/client/package.json b/website/client/package.json
index 07fb2d29e0..9629f78772 100644
--- a/website/client/package.json
+++ b/website/client/package.json
@@ -7,7 +7,7 @@
     "build": "vue-cli-service build",
     "test:unit": "vue-cli-service test:unit --require ./tests/unit/helpers.js",
     "lint": "vue-cli-service lint",
-    "postinstall": "if [ -n \"$npm_config_production\" ]; then npm run build; fi"
+    "postinstall": "node ./scripts/npm-postinstall.js"
   },
   "dependencies": {
     "@vue/cli-plugin-babel": "^4.0.4",
diff --git a/website/client/scripts/npm-postinstall.js b/website/client/scripts/npm-postinstall.js
new file mode 100644
index 0000000000..6d1b3e4d21
--- /dev/null
+++ b/website/client/scripts/npm-postinstall.js
@@ -0,0 +1,5 @@
+const { execSync } = require('child_process');
+
+if (process.env.NODE_ENV === 'production') {
+  execSync('npm run build');
+}