ghc and the hs-packages now simply include the necessary (haskell)
package description files in lib/ghc/package.conf.d and update the
package.cache by running ghc-pkg recache at the end. register and
unregister scripts are no longer needed.
This library provides monad morphism utilities, most commonly used
for manipulating monad transformer stacks.
ok sthen@
(will be hooked to the build during the ghc update)