From 4a2f25da5dd9962b414b71ddae48a86c4d5be95f Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Thu, 2 Apr 2026 20:20:29 +0200
Subject: [PATCH] haskellPackages.criterion: fix test race condition with tasty
 1.5.4

---
 .../development/haskell-modules/configuration-common.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 649b64ec18f3..52b192c4bad6 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -375,6 +375,15 @@ with haskellLib;
     '';
   }) super.streamly-core;
 
+  # Work around tasty >= 1.5.4 parallelism breaking the test suite
+  criterion = appendPatches [
+    (pkgs.fetchpatch {
+      name = "criterion-tasty-1.5.4.patch";
+      url = "https://github.com/haskell/criterion/commit/d555422d1779434432489efbc19d75011226c3e6.patch";
+      hash = "sha256-VRSfdzT/mzdRSMQmmIeycuChvRN/VDhYsHJQb0bRMaA=";
+    })
+  ] super.criterion;
+
   # Expected failures are fixed as of GHC-9.10,
   # but the tests haven't been updated yet.
   # https://github.com/ocharles/weeder/issues/198