slackbuilds/haskell/haskell-th-abstraction/README

This package normalizes variations in the interface for inspecting
datatype information via Template Haskell so that packages and support
a single, easier to use informational datatype while supporting many
versions of Template Haskell.

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