From 6b43a01a3c732c16d5e5cc22420512da7ecf7989 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Thu, 28 Jun 2018 12:41:06 +0200
Subject: travis: Install Cabal library before anything else.

I'm hoping this fixes the issue with travis
builds with earlier ghc versions.

See https://github.com/haskell/cabal/issues/4456
---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 9291f8bc2..152a597fb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -117,6 +117,7 @@ install:
     cabal)
       cabal --version
       travis_retry cabal update
+      cabal install Cabal
       cabal install --disable-optimization --only-dependencies --flags="$FLAGS" --enable-tests --force-reinstalls --reorder-goals --max-backjumps=-1 $CABALARGS
       ;;
   esac
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