SlackBuildsOrg/haskell/haskell-stringsearch

This package provides several functions to quickly search for substrings
in strict or lazy ByteStrings. It also provides functions for breaking
or splitting on substrings and replacing all occurrences of a substring
(the first in case of overlaps) with another.

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