From 5e4058ad85416bc256bc414df4985bbfd4e5eeac Mon Sep 17 00:00:00 2001
From: Timothy Sample <samplet@ngyro.com>
Date: Mon, 3 Sep 2018 21:19:12 -0400
Subject: gnu: ghc-bytestring-handle: Allow newer base and QuickCheck.

* gnu/packages/haskell.scm (ghc-bytestring-handle)[arguments]: Add a phase
that patches the Cabal file to allow newer versions of base and QuickCheck.
---
 gnu/packages/haskell.scm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 1b66d88faa..d8cd4cbba5 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -7008,6 +7008,16 @@ this problem.")
         (base32
          "18f17aja1ivhr3zyg2cccn2m03hdn5jf5410dndkhf12gvgiqs7y"))))
     (build-system haskell-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'configure 'update-constraints
+           (lambda _
+             (substitute* "bytestring-handle.cabal"
+               (("QuickCheck >= 2\\.1\\.2 && < 2\\.11")
+                "QuickCheck >= 2.1.2 && < 2.12")
+               (("base >= 4\\.2 && < 4\\.11")
+                "base >= 4.2 && < 4.12")))))))
     (inputs
      `(("ghc-hunit" ,ghc-hunit)
        ("ghc-quickcheck" ,ghc-quickcheck)
-- 
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