diff --git a/scripts/lib/node_cache.py b/scripts/lib/node_cache.py
index bb193085c2..e840a04ce5 100644
--- a/scripts/lib/node_cache.py
+++ b/scripts/lib/node_cache.py
@@ -82,7 +82,7 @@ def do_yarn_install(target_path, yarn_args, success_stamp, stdout=None, stderr=N
     print("Cached version not found! Installing node modules.")
 
     # Copy the existing node_modules to speed up install
-    if os.path.exists("node_modules"):
+    if os.path.exists("node_modules") and not os.path.exists(cached_node_modules):
         shutil.copytree("node_modules/", cached_node_modules, symlinks=True)
     if os.environ.get('CUSTOM_CA_CERTIFICATES'):
         run([YARN_BIN, "config", "set", "cafile", os.environ['CUSTOM_CA_CERTIFICATES']],