103/151: gnu: Add ghc-extra.

[Paul]

toothbrush pushed a commit to branch wip-haskell-platform-7.10.2-a
in repository guix.

commit a4694951406079eb3969d194a6ad49a3d836d4f7
Author: Paul van der Walt <address@hidden>
Date:   Thu Oct 15 15:39:20 2015 +0200

    gnu: Add ghc-extra.
    
    * gnu/packages/haskell.scm (ghc-extra): New variable.
---
 gnu/packages/haskell.scm |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 279f179..e83af94 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -1397,6 +1397,32 @@ standard Read class, for better deserialisation of 
Haskell values from
 Strings.")
     (license lgpl2.1)))
 
+(define-public ghc-extra
+  (package
+    (name "ghc-extra")
+    (version "1.4.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://hackage.haskell.org/package/extra/extra-";
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "1h9hxkrqrqscx420yz1lmivbrhi6jc3a5ap61vkxd2mhdgark9hf"))))
+    (build-system haskell-build-system)
+    (inputs `(("ghc-quickcheck" ,ghc-quickcheck)))
+    (home-page
+     "https://github.com/ndmitchell/extra#readme";)
+    (synopsis "Extra Haskell functions")
+    (description
+     "A library of extra functions for the standard Haskell libraries.  Most
+functions are simple additions, filling out missing functionality.  A few
+functions are available in later versions of GHC, but this package makes them
+available back to GHC 7.2.")
+    (license bsd-3)))
+
 (define-public ghc-appar
   (package
     (name "ghc-appar")