diff -r b713e4cae2d7 -r 8ed69bd42f10 hgdemandimport/demandimportpy3.py
--- a/hgdemandimport/demandimportpy3.py	Thu Oct 22 12:31:26 2020 -0400
+++ b/hgdemandimport/demandimportpy3.py	Thu Oct 22 18:38:41 2020 -0400
@@ -114,7 +114,7 @@
         if (
             spec is not None
             and spec.loader is not None
-            and getattr(spec.loader, "exec_module")
+            and getattr(spec.loader, "exec_module", None)
         ):
             spec.loader = _lazyloaderex(spec.loader)