From e27de0051702e7c134b2e5746e116b44302dc15e Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Tue, 6 Jun 2023 09:02:50 +0100
Subject: [PATCH] gnugrep: enable parallel build and tests

On a 16-core system number changes are:

- before: 1m34s
- after: 39s

2.5x speedup. If ./configure phase was faster the change would be even
more substantial.
---
 pkgs/tools/text/gnugrep/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/tools/text/gnugrep/default.nix b/pkgs/tools/text/gnugrep/default.nix
index 75c6f6950737..e0f4e5f8d4aa 100644
--- a/pkgs/tools/text/gnugrep/default.nix
+++ b/pkgs/tools/text/gnugrep/default.nix
@@ -36,6 +36,8 @@ stdenv.mkDerivation {
     export MKDIR_P="mkdir -p"
   '';
 
+  enableParallelBuilding = true;
+
   # Fix reference to sh in bootstrap-tools, and invoke grep via
   # absolute path rather than looking at argv[0].
   postInstall =