From 61cefaf7dd9241d89f54f3e9592dd5a8ca972383 Mon Sep 17 00:00:00 2001
From: Brian McKenna <bmckenna@atlassian.com>
Date: Tue, 1 Jan 2019 12:00:43 +0530
Subject: [PATCH] haskellPackages.djinn: apply patch for GHC 8.4

---
 pkgs/development/haskell-modules/configuration-common.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 9e0dd0758b0..8c758e9b22a 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -688,6 +688,13 @@ self: super: {
     sha256 = "1m2d47ni4jbrpvxry50imj91qahr3r7zkqm157clrzlmw6gzpgnq";
   });
 
+  # Djinn's last release was 2014, incompatible with Semigroup-Monoid Proposal
+  # https://github.com/augustss/djinn/pull/8
+  djinn = appendPatch super.djinn (pkgs.fetchpatch {
+    url = https://github.com/augustss/djinn/commit/6cb9433a137fb6b5194afe41d616bd8b62b95630.patch;
+    sha256 = "0s021y5nzrh74gfp8xpxpxm11ivzfs3jwg6mkrlyry3iy584xqil";
+  });
+
   # We cannot build this package w/o the C library from <http://www.phash.org/>.
   phash = markBroken super.phash;