[commit: ghc] wip/docker-ghcci: Darwin Python installation (5177e14)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : wip/docker-ghcci
Link       : http://ghc.haskell.org/trac/ghc/changeset/5177e14b47ccc4a27a38ff7108c1459c83d448ad/ghc

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commit 5177e14b47ccc4a27a38ff7108c1459c83d448ad
Author: David Feuer <David.Feuer at gmail.com>
Date:   Fri Mar 2 01:52:51 2018 -0500

    Darwin Python installation


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5177e14b47ccc4a27a38ff7108c1459c83d448ad
 .circleci/prepare-system.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.circleci/prepare-system.sh b/.circleci/prepare-system.sh
index 84fd513..9f9bb93 100755
--- a/.circleci/prepare-system.sh
+++ b/.circleci/prepare-system.sh
@@ -44,7 +44,8 @@ case "$(uname)" in
     if [[ -n ${TARGET:-} ]]; then
       fail "uname=$(uname) not supported for cross-compilation"
     fi
-    brew install ghc cabal-install python3 ncurses gmp
+    brew install ghc cabal-install ncurses gmp
+    brew upgrade python3
     cabal update
     cabal install --reinstall alex happy haddock hscolour --index-state=$hackage_index_state
     # put them on the $PATH, don't fail if already installed