RyanGlScott reported a failure:
```
Could not find module 'Prelude'; Perhaps you haven't
installed the "dyn" libraries for package ‘base-4.10.0.0’?
```
This might fix it.

Test Plan: harbormaster

Reviewers: austin, bgamari, thomie, RyanGlScott

Reviewed By: RyanGlScott

Subscribers: thomie, simonmar

Differential Revision: https://phabricator.haskell.org/D3013