diff --git a/nixos/boxes/bolty/bolty-boot.nix b/nixos/boxes/bolty/bolty-boot.nix
index ca3de5ea..f64f1c3e 100644
--- a/nixos/boxes/bolty/bolty-boot.nix
+++ b/nixos/boxes/bolty/bolty-boot.nix
@@ -37,8 +37,10 @@
 
   swapDevices = [ ];
 
-  nix.maxJobs = 2;
-  nix.buildCores = 7;
+  nix.settings = {
+    max-jobs = 8;
+    cores = 0; # auto
+  };
 
   zramSwap = {
     enable = true;