From 878725203fc80308de291d15e27ef945ced831cb Mon Sep 17 00:00:00 2001
From: alexfmpe <2335822+alexfmpe@users.noreply.github.com>
Date: Sun, 30 Mar 2025 12:14:47 +0100
Subject: [PATCH] haskell.packages.ghc912.extra: fix build (#390788)

---
 pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
index ebc4f7a40491..921a029525ec 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
@@ -79,6 +79,7 @@ with haskellLib;
 
   doctest = self.doctest_0_23_0;
 
+  extra = doDistribute self.extra_1_8; # compatible with base 4.21
   htree = doDistribute self.htree_0_2_0_0;
   tagged = doDistribute self.tagged_0_8_9;
   time-compat = doDistribute (doJailbreak self.time-compat_1_9_8); # too strict lower bound on QuickCheck