diff --git a/alibuild_helpers/sync.py b/alibuild_helpers/sync.py
index 0ad679e1..ae9dafd5 100644
--- a/alibuild_helpers/sync.py
+++ b/alibuild_helpers/sync.py
@@ -373,7 +373,7 @@ def fetch_symlinks(self, spec):
     ))
 
   def upload_symlinks_and_tarball(self, spec):
-    dieOnError(self.writeStore, "CVMFS backend does not support uploading directly")
+    dieOnError(True, "CVMFS backend does not support uploading directly")
 
 class S3RemoteSync:
   """Sync package build directory from and to S3 using s3cmd.