diff -r 80695628adcb -r 856f381ad74b mercurial/wireprotov1peer.py
--- a/mercurial/wireprotov1peer.py	Mon Apr 23 21:13:19 2018 +0900
+++ b/mercurial/wireprotov1peer.py	Sun Apr 22 11:54:10 2018 -0700
@@ -15,9 +15,6 @@
 from .node import (
     bin,
 )
-from .thirdparty.zope import (
-    interface as zi,
-)
 from . import (
     bundle2,
     changegroup as changegroupmod,
@@ -29,6 +26,9 @@
     util,
     wireprototypes,
 )
+from .utils import (
+    interfaceutil,
+)
 
 urlreq = util.urlreq
 
@@ -110,7 +110,7 @@
         # on that.
         return self.result(timeout)
 
-@zi.implementer(repository.ipeercommandexecutor)
+@interfaceutil.implementer(repository.ipeercommandexecutor)
 class peerexecutor(object):
     def __init__(self, peer):
         self._peer = peer
@@ -308,7 +308,8 @@
             else:
                 f.set_result(result)
 
-@zi.implementer(repository.ipeercommands, repository.ipeerlegacycommands)
+@interfaceutil.implementer(repository.ipeercommands,
+                           repository.ipeerlegacycommands)
 class wirepeer(repository.peer):
     """Client-side interface for communicating with a peer repository.