SlackBuildsOrg/haskell/haskell-cmark-gfm

This package provides Haskell bindings for libcmark-gfm, the reference
parser for GitHub Flavored Markdown, a fully specified variant of
Markdown. It includes sources for libcmark-gfm (0.28.0) and does not
require prior installation of the C library.

After uninstalling, run this command to unregister the package from
the ghc package database:   ghc-pkg recache