From 177255c8aac086b4ea999252a2f042b94e478091 Mon Sep 17 00:00:00 2001
From: Malte Brandy <malte.brandy@maralorn.de>
Date: Sun, 20 Mar 2022 00:19:27 +0100
Subject: [PATCH] haskellPackages.descriptive: pin aeson < 2.0

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

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 08ad743f5abe..e176b74c50b8 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -622,6 +622,10 @@ self: super: {
     '';
   }) super.ghc-mod;
 
+  # 2022-03-16: descriptive is unmaintained since 2018 and archived on github.com
+  # It does not support aeson 2.0
+  descriptive = super.descriptive.override { aeson = self.aeson_1_5_6_0; };
+
   # Build the latest git version instead of the official release. This isn't
   # ideal, but Chris doesn't seem to make official releases any more.
   structured-haskell-mode = overrideCabal (drv: {