From 719e350414e6a4f4ac0ee6a19e79cceac82b3313 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6gler?= <ck3d@gmx.de>
Date: Wed, 20 Jul 2022 08:55:01 +0200
Subject: [PATCH] pixman: Limit threads

---
 pkgs/development/libraries/pixman/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/libraries/pixman/default.nix b/pkgs/development/libraries/pixman/default.nix
index be41526c4f23..ffdaeaef035a 100644
--- a/pkgs/development/libraries/pixman/default.nix
+++ b/pkgs/development/libraries/pixman/default.nix
@@ -17,6 +17,11 @@ stdenv.mkDerivation rec {
 
   configureFlags = lib.optional stdenv.isAarch32 "--disable-arm-iwmmxt";
 
+  preConfigure = ''
+    # https://gitlab.freedesktop.org/pixman/pixman/-/issues/62
+    export OMP_NUM_THREADS=$((NIX_BUILD_CORES > 184 ? 184 : NIX_BUILD_CORES))
+  '';
+
   doCheck = true;
 
   postInstall = glib.flattenInclude;