From 26066e1e2b251be50cc75126d996fff22cec71a9 Mon Sep 17 00:00:00 2001
From: Wolfgang Walther <walther@technowledgy.de>
Date: Mon, 29 Jun 2026 19:28:59 +0200
Subject: [PATCH] haskellPackages.graphviz: allow QuickCheck 2.16

---
 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 84632478b7d4..55dd33846de7 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1529,6 +1529,10 @@ with haskellLib;
   # https://github.com/haskell/fgl/issues/119
   fgl = doJailbreak super.fgl;
 
+  # 2026-06-28: allow QuickCheck 2.16
+  # https://codeberg.org/daniel-casanueva/graphviz/issues/7
+  graphviz = doJailbreak super.graphviz;
+
   # 2026-05-17: allow QuickCheck 2.16
   # https://github.com/haskell-hvr/lzma/issues/45
   lzma = doJailbreak super.lzma;