From 684ba2c2a0066f80c38d79d4c527ab2fbe7bbeca Mon Sep 17 00:00:00 2001
From: Flatcar Buildbot <buildbot@flatcar-linux.org>
Date: Mon, 10 Feb 2025 07:07:40 +0000
Subject: [PATCH] eclass/cargo: Sync with Gentoo

It's from Gentoo commit ddb45b4bb42a99dcf16bcfbbd59a8028fd14187e.
---
 .../src/third_party/portage-stable/eclass/cargo.eclass         | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sdk_container/src/third_party/portage-stable/eclass/cargo.eclass b/sdk_container/src/third_party/portage-stable/eclass/cargo.eclass
index 0bc24feea2..25a2127f63 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/cargo.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/cargo.eclass
@@ -396,6 +396,9 @@ cargo_gen_config() {
 	jobs = $(makeopts_jobs)
 	incremental = false
 
+	[env]
+	RUST_TEST_THREADS = "$(makeopts_jobs)"
+
 	[term]
 	verbose = true
 	$([[ "${NOCOLOR}" = true || "${NOCOLOR}" = yes ]] && echo "color = 'never'")