--- a/hgext/fastannotate/__init__.py	Mon Sep 24 15:19:52 2018 -0700
+++ b/hgext/fastannotate/__init__.py	Wed Sep 26 20:49:28 2018 -0400
@@ -155,7 +155,7 @@
     try:
         import fcntl
         fcntl.flock
-    except StandardError:
+    except (AttributeError, ImportError):
         return False
     else:
         return True