--- a/hgext/remotefilelog/remotefilelogserver.py	Sat Aug 08 15:48:17 2020 +0530
+++ b/hgext/remotefilelog/remotefilelogserver.py	Sat Aug 08 16:24:12 2020 +0530
@@ -23,6 +23,7 @@
     extensions,
     match,
     pycompat,
+    requirements,
     store,
     streamclone,
     util,
@@ -30,7 +31,6 @@
     wireprototypes,
     wireprotov1server,
 )
-from mercurial.interfaces import repository
 from . import (
     constants,
     shallowutil,
@@ -170,7 +170,7 @@
                         if kind == stat.S_IFDIR:
                             visit.append(fp)
 
-            if repository.TREEMANIFEST_REQUIREMENT in repo.requirements:
+            if requirements.TREEMANIFEST_REQUIREMENT in repo.requirements:
                 for (u, e, s) in repo.store.datafiles():
                     if u.startswith(b'meta/') and (
                         u.endswith(b'.i') or u.endswith(b'.d')