From cd33c34578485df663fd9ed39ca5c080d8706824 Mon Sep 17 00:00:00 2001
From: sternenseemann <0rpkxez4ksa01gb3typccl0i@systemli.org>
Date: Mon, 21 Jun 2021 15:17:19 +0200
Subject: [PATCH] haskell.compiler.ghc884: patch for sphinx >= 4.0

With sphinx 4, interpreting the conf.py fails due to a decode
error: https://gitlab.haskell.org/ghc/ghc/-/issues/19962
The fix is an one line change which we have to backport from GHC
master.

9.2 and 8.10.6 will have a fix for this, GHC 9.0.1 and ghcHEAD
already have and GHC 8.10.4 has been patched in nixpkgs already.
---
 pkgs/development/compilers/ghc/8.8.4.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/compilers/ghc/8.8.4.nix b/pkgs/development/compilers/ghc/8.8.4.nix
index 002d83ef6be1..544b96f5e4f0 100644
--- a/pkgs/development/compilers/ghc/8.8.4.nix
+++ b/pkgs/development/compilers/ghc/8.8.4.nix
@@ -134,6 +134,9 @@ stdenv.mkDerivation (rec {
     # upstream patch. Don't forget to check backport status of the upstream patch
     # when adding new GHC releases in nixpkgs.
     ./respect-ar-path.patch
+    # Fix documentation configuration which causes a syntax error with sphinx 4.*
+    # See also https://gitlab.haskell.org/ghc/ghc/-/issues/19962
+    ./sphinx-4-configuration.patch
   ];
 
   postPatch = "patchShebangs .";