08/20: gnu: ghc-cryptohash-md5: Update Cabal file to r4.

[guix-commits]

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

commit b503f4a89adfa91fb934ef0f22369b211992511c
Author: Timothy Sample <address@hidden>
Date:   Fri Nov 1 14:16:44 2019 -0400

    gnu: ghc-cryptohash-md5: Update Cabal file to r4.
    
    * gnu/packages/haskell-crypto.scm (ghc-cryptohash-md5): Update Cabal
    file to r4.
---
 gnu/packages/haskell-crypto.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gnu/packages/haskell-crypto.scm b/gnu/packages/haskell-crypto.scm
index b7c13ed..b7a1b1f 100644
--- a/gnu/packages/haskell-crypto.scm
+++ b/gnu/packages/haskell-crypto.scm
@@ -212,7 +212,7 @@ that hides the C implementation.")
     (build-system haskell-build-system)
     (arguments
      `(#:cabal-revision
-       ("2" "0vyb9cfvpfxpslxvvhd48gw37i9g8ry5x63xwxd9q7xfiqhs7p3a")
+       ("4" "0gzaibjkipijwj9m9l6wrhfk5s3kdvfbhdl7cl1373cjfs41v0m3")
        #:tests? #f)) ; tests require old version of ghc-hunit (0.9)
     (native-inputs `(("ghc-base16-bytestring" ,ghc-base16-bytestring)
                      ("ghc-puremd5" ,ghc-puremd5)