https://github.com/jaraco/keyrings.alt/issues/53

--- keyrings.alt-5.0.1/setup.cfg.orig
+++ keyrings.alt-5.0.1/setup.cfg
@@ -27,7 +27,6 @@
 	pytest-mypy
 	pytest-enabler >= 2.2
 	
-	backports.unittest_mock
 	keyring >= 20
 	
 	pycryptodomex