From 7aff15e8c4fd3f304d82979a49aa47e9780a105b Mon Sep 17 00:00:00 2001
From: Jared Baur <jaredbaur@fastmail.com>
Date: Thu, 13 Jun 2024 21:11:40 -0700
Subject: [PATCH] nixos/systemd-repart: respect NIX_BUILD_CORES for image
 compression

---
 nixos/modules/image/repart-image.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/image/repart-image.nix b/nixos/modules/image/repart-image.nix
index e40406729900..de03beeafc0b 100644
--- a/nixos/modules/image/repart-image.nix
+++ b/nixos/modules/image/repart-image.nix
@@ -90,8 +90,8 @@ let
   }."${compression.algorithm}";
 
   compressionCommand = {
-    "zstd" = "zstd --no-progress --threads=0 -${toString compression.level}";
-    "xz" = "xz --keep --verbose --threads=0 -${toString compression.level}";
+    "zstd" = "zstd --no-progress --threads=$NIX_BUILD_CORES -${toString compression.level}";
+    "xz" = "xz --keep --verbose --threads=$NIX_BUILD_CORES -${toString compression.level}";
   }."${compression.algorithm}";
 in
   stdenvNoCC.mkDerivation (finalAttrs: