From cb75208f9e557f6084a24edcae549343e8b73f38 Mon Sep 17 00:00:00 2001
From: Ivan Malison <IvanMalison@gmail.com>
Date: Thu, 2 Jul 2026 14:17:32 -0700
Subject: [PATCH] nix: build git-blame-rank with a single cargo job

Constrain CARGO_BUILD_JOBS=1 so the git-blame-rank build does not
saturate the machine during rebuilds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 nix-shared/system/essential.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/nix-shared/system/essential.nix b/nix-shared/system/essential.nix
index 3d6a366a..11f57133 100644
--- a/nix-shared/system/essential.nix
+++ b/nix-shared/system/essential.nix
@@ -12,7 +12,11 @@
   in
     if systemPackages == null then null else systemPackages.${packageName} or null;
 
-  git-blame-rank = inputs.git-blame-rank.packages.${system}.default;
+  git-blame-rank = inputs.git-blame-rank.packages.${system}.default.overrideAttrs (old: {
+    env = (old.env or {}) // {
+      CARGO_BUILD_JOBS = "1";
+    };
+  });
   coquiTtsStreamer = inputPackageOrNull "coqui-tts-streamer" "default";
   keepbook = inputs.keepbook.packages.${system}.keepbook.overrideAttrs (_: {
     # Upstream checks currently depend on TS artifacts that are not built in Nix.