Description of problem: The Haskell platform is missing in EPEL 8. Is it possible to add this (FWIW, it was included in EPEL 7)?
Yes, I am planning to build ghc for EPEL8. Unfortunately it was not included in Code Ready Builder.
I opened https://pagure.io/releng/issue/9408
FEDORA-EPEL-2020-c24419cb8d has been submitted as an update to Fedora EPEL 8. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-c24419cb8d
(Note though that ghc-8.2.2 is not going to be the final stable ghc version for epel8, but this is a first step there.)
FEDORA-EPEL-2020-c24419cb8d has been pushed to the Fedora EPEL 8 stable repository. If problem still persists, please make note of it in this bug report.
I see only ghc-8.2.2-68.3.el8 in EPEL 8. https://bodhi.fedoraproject.org/updates/?packages=ghc