nixUtils: migrated some options into a hostsModulle

hosts/laptop/configuration.nix

@@ -17,7 +17,7 @@
     #../../modules/nixos/ly.nix
     ../../modules/nixos/ly.nix
     ../../modules/nixos/anki.nix
-    ../../modules/nixos/nixUtils.nix
+    ../../modules/nixos/nixUtils.nix ../../hostsModules/laptop/nixos/nixUtils.nix
     ../../hostsModules/laptop/nixos/udev.nix
     ../../hostsModules/laptop/nixos/disk.nix
     ../../modules/nixos/printer.nix

hostsModules/laptop/nixos/nixUtils.nix

@@ -0,0 +1,8 @@
+{
+  ...
+}:
+{
+  # nixpkgs-review crashed my laptop multiple times.
+  nix.settings.max-jobs = 2;
+  nix.settings.cores = 2;
+}

modules/nixos/nixUtils.nix

@@ -1,3 +1,4 @@
+# some options are in ../../hostsModules/laptop/nixos/nixUtils.nix
 {
   pkgs-unstable,
   inputs,
@@ -9,9 +10,6 @@
     dates = "weekly";
     options = "--delete-older-than 7d"; # every week delete generations older than a month
   };
-  # nixpkgs-review crashed my laptop multiple times.
-  nix.settings.max-jobs = 2;
-  nix.settings.cores = 2;
 
   #manix is unhappy without this
   nix.nixPath = [