From 3429633af36bcedff106c05e3cc1173641ffc32f Mon Sep 17 00:00:00 2001
From: Luke Granger-Brown <git@lukegb.com>
Date: Mon, 26 Apr 2021 00:49:20 +0000
Subject: [PATCH] qemu: require big-parallel

Compiles in about 2h50m on a 2-core builder, and 20m on a big-parallel
machine.
---
 pkgs/applications/virtualization/qemu/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/applications/virtualization/qemu/default.nix b/pkgs/applications/virtualization/qemu/default.nix
index c04d3b339452..a3f737e4a814 100644
--- a/pkgs/applications/virtualization/qemu/default.nix
+++ b/pkgs/applications/virtualization/qemu/default.nix
@@ -177,6 +177,9 @@ stdenv.mkDerivation rec {
     qemu-system-i386 = "bin/qemu-system-i386";
   };
 
+  # Builds in ~3h with 2 cores, and ~20m with a big-parallel builder.
+  requiredSystemFeatures = [ "big-parallel" ];
+
   meta = with lib; {
     homepage = "http://www.qemu.org/";
     description = "A generic and open source machine emulator and virtualizer";