From 4b36e4af03287c730c4aff145781da1505bb507c Mon Sep 17 00:00:00 2001
From: 9Morello <clara.reism@proton.me>
Date: Thu, 26 Mar 2026 08:51:52 -0300
Subject: [PATCH] Check if Preact is installed before installing React deps

---
 packages/rspack/lib/dependencies.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/rspack/lib/dependencies.js b/packages/rspack/lib/dependencies.js
index 20ebca4271..c6270637a0 100644
--- a/packages/rspack/lib/dependencies.js
+++ b/packages/rspack/lib/dependencies.js
@@ -213,7 +213,7 @@ export function checkReactInstalled() {
 
   const appDir = getMeteorAppDir();
   // Check if React is a dependency in the project
-  const isReactInstalled = checkNpmDependencyExists('react', { cwd: appDir });
+  const isReactInstalled = checkNpmDependencyExists('react', { cwd: appDir }) && !checkNpmDependencyExists('preact', { cwd: appDir });
 
   if (isReactInstalled) {
     // Set environment variable to indicate React is enabled