[PATCH 08/21] gnu: Add ghc-constraints.

[Paul van der Walt]

* gnu/packages/haskell.scm (ghc-constraints): New variable.
---
 gnu/packages/haskell.scm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 44310de..af5a330 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -827,6 +827,29 @@ HTML through @code{Text.HTML.SanitizeXSS.sanitizeXSS} to 
prevent XSS
 attacks.")
     (license bsd-3)))
 
+(define-public ghc-constraints
+  (package
+    (name "ghc-constraints")
+    (version "0.4.1.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://hackage.haskell.org/package/constraints/constraints-";
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "1w3ssvg30rfkp1y20vx0fbq1c0md2wys2rh50mih7645djv56hyx"))))
+    (build-system haskell-build-system)
+    (propagated-inputs `(("ghc-newtype" ,ghc-newtype)))
+    (home-page "http://github.com/ekmett/constraints/";)
+    (synopsis "Constraint manipulation for Haskell")
+    (description
+     "This package provides a set of functions for working with
address@hidden, which were introduced in GHC version 7.4.")
+    (license bsd-3)))
+
 (define-public ghc-objectname
   (package
     (name "ghc-objectname")
-- 
2.6.2