From 922d55bf2df6f73ed24a98a479f0feffa7d9187d Mon Sep 17 00:00:00 2001
From: Mario Rodas <marsam@users.noreply.github.com>
Date: Sat, 24 Jun 2023 04:20:00 +0000
Subject: [PATCH] fetchgit: add a default NIX_BUILD_CORES variable

NIX_BUILD_CORES might not be defined at runtime, so the command would
fail.
---
 pkgs/build-support/fetchgit/nix-prefetch-git | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/build-support/fetchgit/nix-prefetch-git b/pkgs/build-support/fetchgit/nix-prefetch-git
index e46ccf538bd5..ae2e3600800b 100755
--- a/pkgs/build-support/fetchgit/nix-prefetch-git
+++ b/pkgs/build-support/fetchgit/nix-prefetch-git
@@ -206,7 +206,7 @@ checkout_ref(){
 
 # Update submodules
 init_submodules(){
-    clean_git submodule update --init --recursive -j $NIX_BUILD_CORES
+    clean_git submodule update --init --recursive -j ${NIX_BUILD_CORES:-1}
 }
 
 clone(){