Changed: minor stuff; Added: Optimisation of nix

darwin/default.nix

@@ -11,10 +11,27 @@
   nix = {
     settings = {
       experimental-features = [ "nix-command" "flakes" ];
+      max-jobs = "auto"; # Use all CPU cores
+      cores = 0; # Use all cores per build
       # disabled due to https://github.com/NixOS/nix/issues/7273
       # auto-optimise-store = true;
     };
-    enable = false; # using determinate installer
+    enable = true; # using determinate installer
+
+    # Garbage collection
+    gc = {
+      automatic = true;
+      interval = { Weekday = 7; }; # Run weekly
+      options = "--delete-older-than 30d";
+    };
+  };
+
+  # Disable Docs 
+  documentation = {
+    enable = true;
+    doc.enable = false; # Skip large documentation
+    man.enable = true; # Keep man pages
+    info.enable = false; # Skip info pages
   };
 
   nixpkgs.config = { allowUnfree = true; };
@@ -35,6 +52,7 @@
 
   # macOS-specific settings
   programs.fish.enable = true;
+  environment.shells = [ pkgs.fish ];
   system.primaryUser = primaryUser;
   users.users.${primaryUser} = {
     home = "/Users/${primaryUser}";