From 68dd79f73df4a32bc1e23bcfe94e8efd4706d412 Mon Sep 17 00:00:00 2001
From: Phuong Nguyen <phuonguyen@nvidia.com>
Date: Thu, 23 Jul 2026 08:16:03 -0700
Subject: [PATCH] [Common] Avoid invalid make -j 0 in NCCL EP submodule build

Signed-off-by: Phuong Nguyen <phuonguyen@nvidia.com>
---
 setup.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index c0c37364a9..613cb3598c 100644
--- a/setup.py
+++ b/setup.py
@@ -272,8 +272,9 @@ def build_nccl_ep_submodule() -> str:
                 env=env,
             )
         print(f"[NCCL EP] Building libnccl_ep.a (gencode='{gencode}')")
+        make_jobs = f"-j{nproc}" if nproc else "-j"
         subprocess.check_call(
-            ["make", "-j", str(nproc), "-C", "nccl_ep", "lib"],
+            ["make", make_jobs, "-C", "nccl_ep", "lib"],
             cwd=str(nccl_root),
             env=env,
         )