--- a/taskcluster/taskgraph/generator.py
+++ b/taskcluster/taskgraph/generator.py
@@ -133,19 +133,22 @@ class TaskGraphGenerator(object):
         return self._run_until('label_to_taskid')
 
     def _load_kinds(self):
         for path in os.listdir(self.root_dir):
             path = os.path.join(self.root_dir, path)
             if not os.path.isdir(path):
                 continue
             kind_name = os.path.basename(path)
-            logger.debug("loading kind `{}` from `{}`".format(kind_name, path))
 
             kind_yml = os.path.join(path, 'kind.yml')
+            if not os.path.exists(kind_yml):
+                continue
+
+            logger.debug("loading kind `{}` from `{}`".format(kind_name, path))
             with open(kind_yml) as f:
                 config = yaml.load(f)
 
             yield Kind(kind_name, path, config)
 
     def _run(self):
         logger.info("Loading kinds")
         # put the kinds into a graph and sort topologically so that kinds are loaded