https://bugzilla.redhat.com/show_bug.cgi?id=1486878
--- Comment #19 from Fedora Update System updates@fedoraproject.org --- ghc-8.4-20180930092756.9c690d0e has been pushed to the Fedora 28 Modular testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-MODULAR-2018-66b3e8de7c