Fixes on Darwin

Do not use local cache for Darwin systems
Update darwin flakes
Simplify some extra syntax

flake.lock

@@ -52,11 +52,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713543876,
-        "narHash": "sha256-olEWxacm1xZhAtpq+ZkEyQgR4zgfE7ddpNtZNvubi3g=",
+        "lastModified": 1715653378,
+        "narHash": "sha256-6kbg/PI3+SBP17f4T0js3CBsMLVtlD0JqJhDKgzk1mQ=",
         "owner": "lnl7",
         "repo": "nix-darwin",
-        "rev": "9e7c20ffd056e406ddd0276ee9d89f09c5e5f4ed",
+        "rev": "de8b0d60d6fd34f35abffc46adc94ebaa6996ce2",
         "type": "github"
       },
       "original": {
@@ -183,11 +183,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713818326,
-        "narHash": "sha256-aw3xbVPJauLk/bbrlakIYxKpeuMWzA2feGrkIpIuXd8=",
+        "lastModified": 1715486357,
+        "narHash": "sha256-4pRuzsHZOW5W4CsXI9uhKtiJeQSUoe1d2M9mWU98HC4=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "67de98ae6eed5ad6f91b1142356d71a87ba97f21",
+        "rev": "44677a1c96810a8e8c4ffaeaad10c842402647c1",
         "type": "github"
       },
       "original": {
@@ -393,11 +393,11 @@
     },
     "nixunstable": {
       "locked": {
-        "lastModified": 1713714899,
-        "narHash": "sha256-+z/XjO3QJs5rLE5UOf015gdVauVRQd2vZtsFkaXBq2Y=",
+        "lastModified": 1715534503,
+        "narHash": "sha256-5ZSVkFadZbFP1THataCaSf0JH2cAH3S29hU9rrxTEqk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6143fc5eeb9c4f00163267708e26191d1e918932",
+        "rev": "2057814051972fa1453ddfb0d98badbea9b83c06",
         "type": "github"
       },
       "original": {

modules/baseline.nix

@@ -1,4 +1,7 @@
-{ pkgs, ... }:
+{ pkgs, lib, ... }:
+let
+	notDarwin = (! pkgs.stdenv.isDarwin);
+in
 {
     # Enable flakes
     nix = {
@@ -15,8 +18,7 @@
             keep-derivations = true;
             min-free = (toString (1024 * 1024 * 1024) );
             max-free = (toString (5 * 1024 * 1024 * 1024) );
-            substituters = [
-                "http://nixcache.home"
+            substituters = (lib.optional notDarwin [ "http://nixcache.home" ]) ++ [
                 "https://cache.garnix.io"
                 "https://ai.cachix.org"
             ];
@@ -32,8 +34,7 @@
     };
 
     # Base packages that need to be in all my hosts
-    environment.systemPackages = with pkgs; (
-	[
+    environment.systemPackages = with pkgs; [
 		agenix
 		android-file-transfer
 		bitwarden-cli
@@ -56,6 +57,5 @@
 		transcrypt
 		unzip
 		wget
-	]
-    );
+	];
 }