Improve the overall nix-darwin experience

README.md

@@ -64,7 +64,7 @@ Here's an example NixOS configuration for the current stable NixOS:
 
 ## nix-darwin
 
-If you use [nix-darwin] to provide Nix-based configuration for your macOS system, you need to disable nix-darwin's built-in Nix configuration mechanisms by setting `nix.enable = false`; if not, Determinate Nix **does not work properly**.
+If you use [nix-darwin] to provide Nix-based configuration for your macOS system, you need to disable nix-darwin's built-in Nix configuration mechanisms by applying the `determinate` nix-darwin module and setting `determinateNix.enable = true`; if not, Determinate Nix **does not work properly**.
 Here's an example nix-darwin configuration that would be compatible with Determinate Nix:
 
 ```nix
@@ -77,13 +77,20 @@ Here's an example nix-darwin configuration that would be compatible with Determi
 
   outputs = { nixpkgs, ... }: {
     darwinConfigurations."my-username-aarch64-darwin" = inputs.nix-darwin.lib.darwinSystem {
-      inherit system;
+      system = "aarch64-darwin";
+
       modules = [
+        # Add the determinate nix-darwin module
+        inputs.determinate.darwinModules.default
+
+        # Configure the determinate module
         ({ ... }: {
           # Let Determinate Nix handle Nix configuration rather than nix-darwin
-          nix.enable = false;
+          determinateNix = {
+            enable = true;
 
-          # Other nix-darwin settings
+            # Other settings
+          };
         })
       ];
     };
@@ -106,17 +113,23 @@ Here's an example nix-darwin configuration that writes custom settings:
 
   outputs = { determinate, nixpkgs, ... }: {
     darwinConfigurations."my-username-aarch64-darwin" = inputs.nix-darwin.lib.darwinSystem {
-      inherit system;
+      system = "aarch64-darwin";
+
       modules = [
         # Add the determinate nix-darwin module
         inputs.determinate.darwinModules.default
-        ({ ... }: {
-          # Let Determinate Nix handle Nix configuration rather than nix-darwin
-          nix.enable = false;
 
-          # Custom settings written to /etc/nix/nix.custom.conf
-          determinate-nix.customSettings = {
-            flake-registry = "/etc/nix/flake-registry.json";
+        # Configure the determinate module
+        ({ ... }: {
+          determinateNix = {
+            # Enable Determinate Nix to handle your Nix configuration rather than nix-darwin
+            enable = true;
+            # Custom settings written to /etc/nix/nix.custom.conf
+            settings = {
+              auto-optimise-store = true;
+              flake-registry = "/etc/nix/flake-registry.json";
+              sandbox = true;
+            };
           };
         })
       ];

flake.nix

@@ -66,7 +66,7 @@
 
             packages = with pkgs; [
               lychee
-              nixfmt-rfc-style
+              self.formatter.${system}
 
               (writeScriptBin "check-readme-links" ''
                 lychee README.md
@@ -76,7 +76,7 @@
         }
       );
 
-      formatter = forEachSupportedSystem ({ pkgs, ... }: pkgs.nixfmt-rfc-style);
+      formatter = forEachSupportedSystem ({ pkgs, ... }: pkgs.nixfmt);
 
       darwinModules = {
         default = ./modules/nix-darwin/default.nix;