Configuration system does not work for Windows/Visual Studio

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-05-03.10:01:31.085>
labels = ['type-feature', '3.7', 'OS-windows', 'build']
title = 'Configuration system does not work for Windows/Visual Studio'
updated_at = <Date 2017-05-05.22:17:25.784>
user = 'https://bugs.python.org/steveire'

bugs.python.org fields:

activity = <Date 2017-05-05.22:17:25.784>
actor = 'terry.reedy'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Build', 'Windows']
creation = <Date 2017-05-03.10:01:31.085>
creator = 'steveire'
dependencies = []
files = []
hgrepos = []
issue_num = 30252
keywords = []
message_count = 1.0
messages = ['292874']
nosy_count = 5.0
nosy_names = ['paul.moore', 'tim.golden', 'steveire', 'zach.ware', 'steve.dower']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'test needed'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue30252'
versions = ['Python 3.7']