diff --git a/packages/repl/index.mjs b/packages/repl/index.mjs
index 330cd77d..f771208d 100644
--- a/packages/repl/index.mjs
+++ b/packages/repl/index.mjs
@@ -1 +1,8 @@
+// nanostores use process.env which kills the browser build
+window.process = {
+  env: {
+    NODE_ENV: 'development',
+  },
+};
+
 export * from './repl-component.mjs';