[Nix-dev] [Hackage] How to install Hackage package, not presented in nixpkgs, locally?

[Andres Loeh]

> But dependency hell was not gone.
>
> pipes-core-0.1.0: dependency "base-4.5.0.0-f76ceb9607ba9bd4fcfb9c7b92d8cfe1"
> doesn't exist (ignoring)
> pipes-core-0.1.0: dependency
> "categories-1.0.3-e9ab00168a7d0fdacafd64b31a5e1100" doesn't exist (ignoring)
> pipes-core-0.1.0: dependency
> "lifted-base-0.1.1-51e1520336adbfccd889e58e684c89a1" doesn't exist
> (ignoring)
> pipes-core-0.1.0: dependency
> "monad-control-0.3.1.3-a94da65cc1c2dcd38097f790cd885593" doesn't exist
> (ignoring)
> pipes-core-0.1.0: dependency
> "transformers-0.3.0.0-f2303dfef836518cc2f6901210442e10" doesn't exist
> (ignoring)
> pipes-core-0.1.0: dependency "void-0.5.6-2a27beac32f0c526d6cb6dc79bccfbd9"
> doesn't exist (ignoring)
>
> What I don't understand, are the hashes. Where are they from and how to
> solve theese dependency problems?

All these are just warnings "hence the (ignoring)" and completely
normal and harmless. You'll notice you get similar messages for other
Haskell packages as well.

Cheers,
  Andres