220/290: gnu: ghc-contravariant-extras: Update Cabal file to r1.

[guix-commits]

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

commit ae82b3708dd5b4e17fcbf42a8daecfc8ac13bd67
Author: Timothy Sample <address@hidden>
Date:   Fri Nov 1 14:13:53 2019 -0400

    gnu: ghc-contravariant-extras: Update Cabal file to r1.
    
    * gnu/packages/haskell-xyz.scm (ghc-contravariant-extras): Update Cabal
    file to r1.
---
 gnu/packages/haskell-xyz.scm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 4f558b4..75f9277 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -2278,6 +2278,9 @@ a vocabulary for working with them.")
         (base32
          "0gg62ccl94kvh7mnvdq09pifqxjx2kgs189si90nmg44bafj7a9n"))))
     (build-system haskell-build-system)
+    (arguments
+     `(#:cabal-revision
+       ("1" "1h2955ahga6i4fn7k8v66l03v77p6fhsac6ck8gpabkc08ij60wp")))
     (inputs
      `(("ghc-tuple-th" ,ghc-tuple-th)
        ("ghc-contravariant" ,ghc-contravariant)