diff --git a/src/internal/cacheHttpClient.ts b/src/internal/cacheHttpClient.ts
index 880ebff..f96ca38 100644
--- a/src/internal/cacheHttpClient.ts
+++ b/src/internal/cacheHttpClient.ts
@@ -80,7 +80,8 @@ export function getCacheVersion(
   compressionMethod?: CompressionMethod,
   enableCrossOsArchive = false
 ): string {
-  const components = paths
+  // don't pass changes upstream
+  const components = paths.slice()
 
   // Add compression method to cache version to restore
   // compressed cache as per compression method