[Nix-dev] How to handle the inclusion of binary in GHC stdlib?

[Andres Loeh]

Hi.

> Starting with GHC 7.2 the binary package has been included in the
> standard library. The same binary package is still available from
> hackage as well. If a haskell library is build via nix then the binary
> package *from hackage* will be used. This not as expected. I'd expect
> the package to use the standard library version by default.

I don't see why it's a big problem in practice, but we've been
preferring GHC packages elsewhere, so I've tried to fix this.

Cheers,
  Andres