Extract settings for Darwin

system/default/nix.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ lib, ... }:
 {
   # Nix package manager configuration
   nix = {
@@ -6,14 +6,14 @@
       # Enable experimental features for modern Nix functionality
       # - "nix-command": Enables the new unified 'nix' command interface
       # - "flakes": Enables Nix flakes for reproducible and composable configurations
-      experimental-features = "nix-command flakes";
+      experimental-features = [ "nix-command" "flakes" ];
 
       # Specify which users are allowed to run nix commands
-      allowed-users = [ "tb" ];
+      allowed-users = lib.mkDefault [ "tb" ];
 
       # Users who can act as trusted users (can override settings)
       # Trusted users can use --option flags and import from derivations
-      trusted-users = [ "root" "tb" ];
+      trusted-users = lib.mkDefault [ "root" "tb" ];
 
       # Show more lines of build output on failure
       log-lines = 50;
@@ -35,9 +35,6 @@
       # Enable automatic store optimization
       # This deduplicates files to save disk space
       automatic = true;
-
-      # Run optimization weekly
-      dates = [ "weekly" ];
     };
   };