lfam pushed a commit to branch master
in repository guix.

commit 41167bd2553b5fc3094cc91a5580fb847c7f5f86
Author: ng0 <n...@we.make.ritual.n0.is>
Date:   Sun Sep 18 16:09:57 2016 +0000

    gnu: Add ghc-monads-tf.
    
    * gnu/packages/haskell.scm (ghc-monads-tf): New variable.
    
    Signed-off-by: Leo Famulari <l...@famulari.name>
---
 gnu/packages/haskell.scm |   23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index aebc7a9..d8c849e 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -6827,4 +6827,27 @@ of two versions of a source file.  It provides a good 
balance between
 performance, nice output for humans, and simplicity of implementation.")
     (license license:bsd-3)))
 
+(define-public ghc-monads-tf
+  (package
+    (name "ghc-monads-tf")
+    (version "0.1.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://hackage.haskell.org/package/monads-tf/monads-tf-";
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "1wdhskwa6dw8qljbvwpyxj8ca6y95q2np7z4y4q6bpf4anmd5794"))))
+    (build-system haskell-build-system)
+    (home-page "http://hackage.haskell.org/package/monads-tf";)
+    (synopsis "Monad classes, using type families")
+    (description
+     "Monad classes using type families, with instances for various monad 
transformers,
+inspired by the paper 'Functional Programming with Overloading and Higher-Order
+Polymorphism', by Mark P Jones.  This package is almost a compatible 
replacement for
+the @code{mtl-tf} package.")
+    (license license:bsd-3)))
+
 ;;; haskell.scm ends here

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