Using relative path as a --prefix during configure.

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-01-21.07:52:12.253>
labels = ['type-bug', '3.7', 'build']
title = 'Using relative path as a --prefix during configure.'
updated_at = <Date 2020-01-24.18:53:02.910>
user = 'https://bugs.python.org/Sankark'

bugs.python.org fields:

activity = <Date 2020-01-24.18:53:02.910>
actor = 'eric.araujo'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Build']
creation = <Date 2020-01-21.07:52:12.253>
creator = 'Sankark'
dependencies = []
files = []
hgrepos = []
issue_num = 39405
keywords = []
message_count = 2.0
messages = ['360360', '360639']
nosy_count = 2.0
nosy_names = ['eric.araujo', 'Sankark']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'pending'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue39405'
versions = ['Python 3.7']