252/328: gnu: ghc-trifecta: Update Cabal file to r4.

[guix-commits]

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

commit d4a0b8fa3ac2fd55d387bc49243dd060e1ba2ddd
Author: Timothy Sample <address@hidden>
Date:   Sat Nov 2 20:04:21 2019 -0400

    gnu: ghc-trifecta: Update Cabal file to r4.
    
    * gnu/packages/haskell-xyz.scm (ghc-trifecta): Update Cabal file to r4.
---
 gnu/packages/haskell-xyz.scm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 24722e8..83e5674 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -10951,7 +10951,10 @@ compute the difference between arbitrary abstract 
datatypes (ADTs) using
                (base32
                 "0hznd8i65s81xy13i2qc7cvipw3lfb2yhkv53apbdsh6sbljz5sk"))))
     (build-system haskell-build-system)
-    (arguments `(#:tests? #f)) ; doctest suite fails to build on i686
+    (arguments
+     `(#:tests? #f ; doctest suite fails to build on i686
+       #:cabal-revision
+       ("4" "0xbwyvwl6f2zylk60f2akwgq03qv49113xil7b1z1s3vlwbn5aj1")))
     (inputs
      `(("ghc-reducers" ,ghc-reducers)
        ("ghc-semigroups" ,ghc-semigroups)