--- a/mercurial/demandimport.py	Thu Apr 13 16:28:15 2017 +0200
+++ b/mercurial/demandimport.py	Fri Apr 14 12:34:26 2017 -0700
@@ -274,6 +274,7 @@
     'fcntl',
     'nt', # pathlib2 tests the existence of built-in 'nt' module
     'win32com.gen_py',
+    'win32com.shell', # 'appdirs' tries to import win32com.shell
     '_winreg', # 2.7 mimetypes needs immediate ImportError
     'pythoncom',
     # imported by tarfile, not available under Windows