From d21b1af8916ae507400a9a8e2cb51c9bdb72586b Mon Sep 17 00:00:00 2001
From: Alex Vong <alexvong1995@gmail.com>
Date: Mon, 7 Aug 2017 15:15:12 +0800
Subject: [PATCH 6/8] gnu: Add ghc-monadplus.

* gnu/packages/haskell.scm (ghc-monadplus): New variable.
---
 gnu/packages/haskell.scm | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 4a322ca4b..6ad6f7799 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -3996,6 +3996,26 @@ used with GHC versions which already provide the \"Control.Monad.Fail\" module
 to make way for GHC's own \"Control.Monad.Fail\" module.")
     (license license:bsd-3)))
 
+(define-public ghc-monadplus
+  (package
+    (name "ghc-monadplus")
+    (version "1.4.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://hackage.haskell.org/package/monadplus"
+                           "/monadplus-" version ".tar.gz"))
+       (sha256
+        (base32 "15b5320wdpmdp5slpphnc1x4rhjch3igw245dp2jxbqyvchdavin"))))
+    (build-system haskell-build-system)
+    (home-page "https://hackage.haskell.org/package/monadplus")
+    (synopsis
+     "Filtering and folding over arbitrary @code{MonadPlus} instances")
+    (description
+     "This package generalizes many common stream operations such as
+@code{filter}, @code{catMaybes} etc.")
+    (license license:bsd-3)))
+
 (define-public ghc-byteorder
   (package
     (name "ghc-byteorder")
-- 
2.13.4