From 072a0d887280ae1a5e7a754c5329024798948fcf Mon Sep 17 00:00:00 2001 From: Peter Simons Date: Thu, 7 Sep 2017 10:47:47 +0200 Subject: [PATCH] haskell-happy: fix build with ghc-7.8.x --- pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix | 3 +++ 1 file changed, 3 insertions(+) diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix index 3914e3d9b93..b4e975187cc 100644 --- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix +++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix @@ -162,4 +162,7 @@ self: super: { comonad = dontCheck super.comonad; semigroupoids = dontCheck super.semigroupoids; + # https://github.com/simonmar/happy/issues/103 + happy = super.happy.override { mtl = self.mtl_2_2_1; }; + }