315/328: gnu: Add ghc-groups.

[guix-commits]

samplet pushed a commit to branch wip-haskell-updates
in repository guix.

commit cb44e15d23b6b54d693c0749860744c1f6bbfbaf
Author: Timothy Sample <address@hidden>
Date:   Wed Nov 13 00:33:54 2019 -0500

    gnu: Add ghc-groups.
    
    * gnu/packages/haskell-xyz.scm (ghc-groups): New variable.
---
 gnu/packages/haskell-xyz.scm | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 9d160a2..63ec19f 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -4379,6 +4379,25 @@ and edge labels with positional information, etc.
 @end enumerate\n")
     (license license:bsd-3)))
 
+(define-public ghc-groups
+  (package
+    (name "ghc-groups")
+    (version "0.4.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "https://hackage.haskell.org/package/";
+                            "groups/groups-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ggkygkyxw5ga4cza82bjvdraavl294k0h6b62d2px7z3nvqhifx"))))
+    (build-system haskell-build-system)
+    (home-page "https://hackage.haskell.org/package/groups";)
+    (synopsis "Haskell 98 groups")
+    (description "This package provides Haskell 98 groups.  A group is a
+monoid with invertibility.")
+    (license license:bsd-3)))
+
 (define-public ghc-gtk2hs-buildtools
   (package
     (name "ghc-gtk2hs-buildtools")