hgext/narrow/__init__.py

--- a/hgext/narrow/__init__.py	Fri Oct 05 20:24:07 2018 +0300
+++ b/hgext/narrow/__init__.py	Fri Oct 05 22:19:19 2018 +0300
@@ -62,6 +62,7 @@
     if not repo.local():
         return
 
+    repo.ui.setconfig('experimental', 'narrow', True, 'narrow-ext')
     if repository.NARROW_REQUIREMENT in repo.requirements:
         narrowrepo.wraprepo(repo)
         narrowwirepeer.reposetup(repo)