For the core libraries we typically support the latest 3 major GHC release, so back to 7.4 right now.

On Sep 2, 2014 11:24 PM, "Ganesh Sittampalam" <ganesh@earth.li> wrote:
Hi,

The HTTP package supports a whole load of old GHCs - the current version
should actually work with GHC 6.10.

For future releases I plan to drop most of these. Any opinions about how
far back it should support?

I'm thinking restricting it to either 7.4+ or 7.6+, but I'm open to
keeping support for older versions too if there's a real need.

Cheers,

Ganesh
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