Built failure on Hackage due to missing libraries

[Boris Lykah]

Hi everyone!

Recently I uploaded package to Hackage
(http://hackage.haskell.org/package/groundhog-0.0.1) and it failed
with an error as if the libraries monad-control and pool were not
exposed.

What is the current situation with these libraries? According to Cabal
FAQ this could mean that they were built with --user flag while my
package is built with --global or they are not exposed at all.

--
Regards,
Boris