>From 3f276166e003f2f38dffead5d0373cb3323a3216 Mon Sep 17 00:00:00 2001
From: John Soo <address@hidden>
Date: Fri, 10 Apr 2020 21:05:16 -0700
Subject: [PATCH 02/25] gnu: Add ghc-data-fix.

* gnu/packages/haskell-xyz.scm (ghc-data-fix): New variable.
---
 gnu/packages/haskell-xyz.scm | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index d22a08e7fb..a91caed039 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -19,7 +19,7 @@
 ;;; Copyright © 2018, 2019 Gabriel Hondet <address@hidden>
 ;;; Copyright © 2019 Robert Vollmert <address@hidden>
 ;;; Copyright © 2019 Jacob MacDonald <address@hidden>
-;;; Copyright © 2019 John Soo <address@hidden>
+;;; Copyright © 2019,2020 John Soo <address@hidden>
 ;;; Copyright © 2019 Kyle Meyer <address@hidden>
 ;;; Copyright © 2019 Alex Griffin <address@hidden>
 ;;; Copyright © 2020 Brett Gilio <address@hidden>
@@ -2696,6 +2696,28 @@ package.")
   package.")
     (license license:bsd-3)))
 
+(define-public ghc-data-fix
+  (package
+    (name "ghc-data-fix")
+    (version "0.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "mirror://hackage/package/data-fix/"
+             "data-fix-" version ".tar.gz"))
+       (sha256
+        (base32 "14hk6hq5hdb3l5bhmzhw086jpzlvp9qbw9dzw30wlz5jbh2ihmvy"))))
+    (build-system haskell-build-system)
+    (home-page "https://github.com/spell-music/data-fix")
+    (synopsis "Fixpoint data types")
+    (description
+     "Fixpoint types and recursion schemes.  If you define your AST as
+fixpoint type, you get fold and unfold operations for free.
+
+Thanks for contribution to: Matej Kollar, Herbert Valerio Riedel")
+    (license license:bsd-3)))
+
 (define-public ghc-data-hash
   (package
     (name "ghc-data-hash")
-- 
2.26.0