diff -uNr wheel-0.30.0.orig/setup.py wheel-0.30.0/setup.py
--- wheel-0.30.0.orig/setup.py	2017-07-29 22:08:53.000000000 +0200
+++ wheel-0.30.0/setup.py	2018-02-23 13:30:44.736351678 +0100
@@ -38,7 +38,7 @@
       license='MIT',
       packages=find_packages(),
       extras_require={
-          'signatures': ['keyring', 'keyrings.alt'],
+          'signatures': ['keyring'],
           'signatures:sys_platform!="win32"': ['pyxdg'],
           'faster-signatures': ['ed25519ll'],
           'tool': [],
diff -uNr wheel-0.30.0.orig/wheel/tool/__init__.py wheel-0.30.0/wheel/tool/__init__.py
--- wheel-0.30.0.orig/wheel/tool/__init__.py	2017-08-06 13:31:33.000000000 +0200
+++ wheel-0.30.0/wheel/tool/__init__.py	2018-02-23 13:30:33.861317739 +0100
@@ -31,10 +31,9 @@
     try:
         from ..signatures import keys
         import keyring
-        assert keyring.get_keyring().priority
     except (ImportError, AssertionError):
         raise WheelError(
-            "Install wheel[signatures] (requires keyring, keyrings.alt, pyxdg) for signatures.")
+            "Install wheel[signatures] (requires keyring, pyxdg) for signatures.")
 
     return keys.WheelKeys, keyring