nix builder

hosts/nix-builder/nixos.nix

@@ -1,4 +1,27 @@
 {
   imports = [ ./hardware-configuration.nix ];
 
+  fileSystems."/nix/store" = {
+    device = "/dev/disk/by-label/nix-store";
+    fsType = "ext4";
+
+    options = [
+      "noatime"
+    ];
+
+    neededForBoot = true;
+  };
+
+  fileSystems."/var/lib/nix-build" = {
+    device = "/dev/disk/by-label/nix-build";
+    fsType = "ext4";
+
+    options = [
+      "noatime"
+    ];
+  };
+
+  nix.settings.build-dir = "/var/lib/nix-build";
+
+  services.fstrim.enable = true;
 }

modules/systems/nix/common.nix

@@ -7,6 +7,8 @@
       "flakes"
     ];
 
+    connect-timeout = 10;
+
     extra-substituters = [
       "https://cache.nixos.org"
       "https://nix-community.cachix.org"