haskell-network: don't build old versions of this package with a recent GHC
haskell-parallel: don't build old versions of this package with a recent GHC
haskell-mtl: don't build old versions of this package with a recent GHC
haskell-fgl: don't build old versions of this package with a recent GHC
haskell-deepseq: don't build old versions of this package with a recent GHC
haskell-binary: don't build old versions of this package with a recent GHC