From e6483fb7e2d8df0feb6aa2d70d8c9e56254644b0 Mon Sep 17 00:00:00 2001
From: maralorn <mail@maralorn.de>
Date: Sat, 18 Nov 2023 00:31:27 +0100
Subject: [PATCH] haskell.packages.ghc90.hspec-megaparsec: Fix build

Needed for HLS
---
 .../haskell-modules/configuration-ghc-9.0.x.nix |  2 ++
 .../configuration-hackage2nix/main.yaml         |  1 +
 .../haskell-modules/hackage-packages.nix        | 17 +++++++++++++++++
 3 files changed, 20 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
index 453526274094..de1412f4c0ee 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
@@ -171,4 +171,6 @@ self: super: {
 
   # Requires GHC < 9.4
   ghc-source-gen = doDistribute (unmarkBroken super.ghc-source-gen);
+
+  hspec-megaparsec = super.hspec-megaparsec_2_2_0;
 }
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 8e43db7fd330..32178ebccdfd 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -117,6 +117,7 @@ extra-packages:
   - hspec < 2.8                         # 2022-04-07: Needed for tasty-hspec 1.1.6
   - hspec-core < 2.8                    # 2022-04-07: Needed for tasty-hspec 1.1.6
   - hspec-discover < 2.8                # 2022-04-07: Needed for tasty-hspec 1.1.6
+  - hspec-megaparsec == 2.2.0           # 2023-11-18: Latest version compatible with ghc 9.0, needed for HLS
   - hspec-meta < 2.8                    # 2022-12-07: Needed for elmPackages.elm / hspec-discover
   - hspec-golden == 0.1.*               # 2022-04-07: Needed for elm-format
   - http2 < 3.3                         # 2023-08-24: Needed for twain <https://github.com/alexmingoia/twain/issues/5>
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index e33cdba4c6b3..4c547fb457b8 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -159093,6 +159093,23 @@ self: {
        license = lib.licenses.bsd3;
      }) {};
 
+  "hspec-megaparsec_2_2_0" = callPackage
+    ({ mkDerivation, base, containers, hspec, hspec-expectations
+     , megaparsec
+     }:
+     mkDerivation {
+       pname = "hspec-megaparsec";
+       version = "2.2.0";
+       sha256 = "0hyf06gzzqd6sqd76crwxycwgx804sd39z7i0c2vmv1qgsxv82gn";
+       libraryHaskellDepends = [
+         base containers hspec-expectations megaparsec
+       ];
+       testHaskellDepends = [ base hspec hspec-expectations megaparsec ];
+       description = "Utility functions for testing Megaparsec parsers with Hspec";
+       license = lib.licenses.bsd3;
+       hydraPlatforms = lib.platforms.none;
+     }) {};
+
   "hspec-megaparsec" = callPackage
     ({ mkDerivation, base, hspec, hspec-expectations, megaparsec }:
      mkDerivation {