This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.
This package provides two new operations, GHC.Dup.dup and GHC.Dup.deepDup, that allow the
programmer to prevent the result of two evaluations of the same expression to
be shared.