I am in process of upgrading to lts-4.0. There is some issues,
related to new hspec version, but it is of little problem.
Also, there was need of patching haskell-dav, so just now it is
ahead of plan in DHG_packages, I hope to settle it very soon.
Issue is with aeson. It have some pathes to conditionally compile TH
module and conditionally use -threaded flag. I found no rationale, and
these patches do not apply on aeson-0.10.0.0.
Why are them? What exactly they fix? Are they still needed, in
times of ghc-7.10?
Also, is dh-haskell moving toward sid?
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