diff --git a/Makefile b/Makefile
index 13410f52..9543af67 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ home:
 	nix --extra-experimental-features "nix-command flakes" run home-manager/master -- switch --flake .#mirai -b backup
 
 nixos:
-	sudo nixos-rebuild switch --flake .
+	sudo nixos-rebuild switch --flake . -j 1
 
 deck:
 	nix run home-manager/master -- switch --flake .#deck
diff --git a/nixos/mirai/configuration.nix b/nixos/mirai/configuration.nix
index 64520764..a7b1fa73 100644
--- a/nixos/mirai/configuration.nix
+++ b/nixos/mirai/configuration.nix
@@ -38,6 +38,8 @@
 
   nix = {
     settings = {
+      max-jobs = 1;
+      cores = 8;
       auto-optimise-store = true;
       extra-experimental-features = "nix-command flakes auto-allocate-uids";
       trusted-users = ["root" "fs0c131y" "remotebuilder"];
diff --git a/nixos/ryu/configuration.nix b/nixos/ryu/configuration.nix
index 14701132..0989b095 100644
--- a/nixos/ryu/configuration.nix
+++ b/nixos/ryu/configuration.nix
@@ -43,6 +43,8 @@
 
   nix = {
     settings = {
+      max-jobs = 1;
+      cores = 12;
       auto-optimise-store = true;
       extra-experimental-features = "nix-command flakes auto-allocate-uids";
       trusted-users = ["root" "servius"];