From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul van der Walt <paul@denknerd.org>
Subject: Re: [PATCH 1/2] gnu: Add ghc-transformers
Date: Thu, 15 Oct 2015 17:24:26 +0200
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References: <1444595036-20254-1-git-send-email-james.trotter@gmail.com>
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To: James David Trotter <james.trotter@gmail.com>
Cc: guix-devel@gnu.org

Hello James, all,

On 2015-10-11 at 22:23, quoth James David Trotter:
> +(define-public ghc-transformers
> +  (package
> +    (name "ghc-transformers")
> +    (version "0.4.3.0")

Now that there are patches ready to provide the latest Haskell Platform
(version 7.10.2a as listed on [0]), i propose we refrain from packaging
things which GHC already provides.  Notably, providing a newer version
generally causes warnings (and occasional build failures depending on
which package we're talking about =E2=80=94 Idris was one of those) that =
GHC
requires (e.g., as in this case) "transformers-0.4.2.0" but some other
dependency requires "transformers-0.4.3.0".  Therefore, we should only
package cabal items *not* on the `Core Libraries' list at [0].

WDYT?

Kind regards,
p.

0. <https://www.haskell.org/platform/contents.html>