Monad classes using type families, with instances for various monad
transformers, inspired by the paper /Functional Programming with
Overloading and Higher-Order Polymorphism/, by Mark P Jones, in
Advanced School of Functional Programming, 1995
(https://web.cecs.pdx.edu/~mpj/pubs/springschool.html).

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