--- a/setup.py	Mon Feb 12 16:51:30 2018 -0500
+++ b/setup.py	Mon Jan 29 16:19:33 2018 -0500
@@ -792,7 +792,8 @@
             'mercurial.thirdparty.attr',
             'hgext', 'hgext.convert', 'hgext.fsmonitor',
             'hgext.fsmonitor.pywatchman', 'hgext.highlight',
-            'hgext.largefiles', 'hgext.lfs', 'hgext.zeroconf', 'hgext3rd',
+            'hgext.largefiles', 'hgext.lfs', 'hgext.narrow',
+            'hgext.zeroconf', 'hgext3rd',
             'hgdemandimport']
 
 common_depends = ['mercurial/bitmanipulation.h',