Ben Gamari authored Jun 14, 2018 and Ben Gamari committed Jun 14, 2018

It's not entirely clear why this is necessary, but this currently fails
on Windows and the difference seems rather minor.

Test Plan: Validate on Windows

Reviewers: Phyx

Subscribers: rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4842