From d8d308f1c564149920bc2ff4e1ca828e6c612d11 Mon Sep 17 00:00:00 2001
From: Tim Shamilov <3495974+shamilovtim@users.noreply.github.com>
Date: Mon, 26 Oct 2026 13:29:32 -0400
Subject: [PATCH] Fix Hermes configuration after source directory changes

---
 .../ReactAndroid/hermes-engine/build.gradle.kts        | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts b/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts
index 7db67e79333a..3c5bae1e0776 100644
--- a/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts
+++ b/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts
@@ -183,9 +183,18 @@ fun buildHermesCCommandLineArgs() = listOf(
     ndkBuildJobs,
 )
 
+// CMake caches contain absolute paths. Clear them only when Gradle runs configuration again.
+fun CustomExecTask.clearCMakeCacheBeforeConfigure(hermesBuildDir: File) {
+  doFirst {
+    File(hermesBuildDir, "CMakeCache.txt").delete()
+    File(hermesBuildDir, "CMakeFiles").deleteRecursively()
+  }
+}
+
 val configureBuildForHermes by
     tasks.registering(CustomExecTask::class) {
       dependsOn(installCMake)
+      clearCMakeCacheBeforeConfigure(hermesBuildDir)
       workingDir(hermesDir)
       inputs.dir(hermesDir)
       outputs.files(hermesBuildOutputFileTree)
@@ -240,6 +249,7 @@ val buildHermesLib by
 val configureBuildForHermesWithDebugger by
     tasks.registering(CustomExecTask::class) {
       dependsOn(installCMake)
+      clearCMakeCacheBeforeConfigure(hermesBuildDir)
       workingDir(hermesDir)
       inputs.dir(hermesDir)
       outputs.files(hermesBuildOutputFileTree)