From 10c28ba328821b57e41d88b7d65de60fcc7c6e78 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Thu, 9 May 2019 14:31:35 +0000
Subject: [PATCH] haskell-happy: apply patches to fix the build with ghc-8.8.x

---
 pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
index 8a443114913..baee4ae1fb9 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
@@ -131,5 +131,9 @@ self: super: {
     url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/hackage-security-0.5.3.0.patch";
     sha256 = "0l8x0pbsn18fj5ak5q0g5rva4xw1s9yc4d86a1pfyaz467b9i5a4";
   });
+  happy = appendPatch super.happy (pkgs.fetchpatch {
+    url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/happy-1.19.9.patch";
+    sha256 = "1zmcb7dgcwivq2mddcy1f20djw2kds1m7ahwsa4xpbbwnijc6zjx";
+  });
 
 }