diff --git a/contrib/cmake/bootstrap.py b/contrib/cmake/bootstrap.py
index e9524dad7..3df17f177 100755
--- a/contrib/cmake/bootstrap.py
+++ b/contrib/cmake/bootstrap.py
@@ -87,7 +87,7 @@ def mk_sym_link(target, linkName):
     logging.warning('Creating symbolic links is not supported. Just making a copy instead')
     if os.path.isdir(target):
       # Recursively copy directory
-      shutil.copytree(src=target, dst=linkName, symlinks=False, ignore=False)
+      shutil.copytree(src=target, dst=linkName, symlinks=False)
     else:
       # Copy file
       assert os.path.isfile(target)