Here is my attempt to make packages compile with GHC-7.10 and older compilers without warnings: https://hackage.haskell.org/package/prelude-compat-0.0/candidate https://hackage.haskell.org/package/prelude2010-0.0/candidate The idea is that prelude2010:Prelude maintains the export list of haskell2010:Prelude such that you are saved both from identifier conflicts and warnings about redundant imports of Data.Foldable etc. Unfortunately, when I try to use it on GHC-7.8.4 together with base-noprelude, I am told that base-noprelude cannot be installed with Cabal-1.22. :-( However, when thinking about adapting all my packages to this work-around I'd prefer to switch to the real solution, namely split base packages that can be upgraded independently from GHC.