diff --git a/modules/base.nix b/modules/base.nix
index 9834f8f..e9334f5 100644
--- a/modules/base.nix
+++ b/modules/base.nix
@@ -45,7 +45,11 @@
 
     # On-the-fly optimisation of nix store
     autoOptimiseStore = true;
+
+    # Make nix build in background less noticeable
+    daemonIONiceLevel = 5; # 0-7
   };
+  systemd.services.nix-daemon.serviceConfig.CPUSchedulingPolicy = "batch";
 
   nixpkgs.config = {
     # Explicitly allow unfree packages (rule of thumb: assets ok, code not ok)