Skylighting is a syntax highlighting library with support for over
one hundred languages. It derives its tokenizers from XML syntax
definitions used by KDE's KSyntaxHighlighting framework, so any syntax
supported by that framework can be added. An optional command-line
program is provided. Skylighting is intended to be the successor
to highlighting-kate.

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