Try upgrading ghc and cabal
authorLuke Lau <luke_lau@icloud.com>
Sat, 24 Aug 2019 22:11:27 +0000 (18:11 -0400)
committerGitHub <noreply@github.com>
Sat, 24 Aug 2019 22:11:27 +0000 (18:11 -0400)

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