From 7a10ebe3612ac71232052124fad9f1a00f7d950f Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 8 May 2020 11:14:36 +0200
Subject: [PATCH] haskell-pantry: apply upstream patch to fix the build with
 ghc-8.10.x

---
 .../haskell-modules/configuration-ghc-8.10.x.nix          | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix
index 7715705a27e..ff5f1e55063 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix
@@ -138,4 +138,12 @@ self: super: {
     ghc-lib-parser-ex = addBuildDepend super.ghc-lib-parser-ex super.ghc-lib-parser;
   };
 
+  # https://github.com/commercialhaskell/pantry/issues/21
+  pantry = appendPatch super.pantry (pkgs.fetchpatch {
+    name = "add-cabal-3.2.x-support.patch";
+    url = "https://patch-diff.githubusercontent.com/raw/commercialhaskell/pantry/pull/22.patch";
+    sha256 = "198hsfjsy83s7rp71llf05cwa3vkm74g73djg5p4sk4awm9s6vf2";
+    excludes = ["package.yaml"];
+  });
+
 }