diff -r e58e234096de -r 77b8588dd84e mercurial/repair.py
--- a/mercurial/repair.py	Sat Aug 08 15:48:17 2020 +0530
+++ b/mercurial/repair.py	Sat Aug 08 16:24:12 2020 +0530
@@ -26,9 +26,9 @@
     pathutil,
     phases,
     pycompat,
+    requirements,
     util,
 )
-from .interfaces import repository
 from .utils import (
     hashutil,
     stringutil,
@@ -419,7 +419,7 @@
 
 def manifestrevlogs(repo):
     yield repo.manifestlog.getstorage(b'')
-    if repository.TREEMANIFEST_REQUIREMENT in repo.requirements:
+    if requirements.TREEMANIFEST_REQUIREMENT in repo.requirements:
         # This logic is safe if treemanifest isn't enabled, but also
         # pointless, so we skip it if treemanifest isn't enabled.
         for unencoded, encoded, size in repo.store.datafiles():
@@ -477,7 +477,7 @@
 
         progress.complete()
 
-        if repository.TREEMANIFEST_REQUIREMENT in repo.requirements:
+        if requirements.TREEMANIFEST_REQUIREMENT in repo.requirements:
             # This logic is safe if treemanifest isn't enabled, but also
             # pointless, so we skip it if treemanifest isn't enabled.
             for dir in pathutil.dirs(seenfiles):