add regression test for macOS evaluation

checks/flake-module.nix

@@ -67,6 +67,9 @@ in
             lib.mapAttrs' (
               name: config: lib.nameValuePair "nixos-${name}" config.config.system.build.toplevel
             ) (lib.filterAttrs (n: _: !lib.hasPrefix "test-" n) self.nixosConfigurations)
+            // lib.mapAttrs' (
+              name: config: lib.nameValuePair "darwin-${name}" config.config.system.build.toplevel
+            ) (self.darwinConfigurations or { })
             // lib.mapAttrs' (n: lib.nameValuePair "package-${n}") packagesToBuild
             // lib.mapAttrs' (n: lib.nameValuePair "devShell-${n}") self'.devShells
             // lib.mapAttrs' (name: config: lib.nameValuePair "home-manager-${name}" config.activation-script) (

flake.nix

@@ -62,6 +62,14 @@
       {
         clan = {
           meta.name = "clan-core";
+          inventory = {
+            services = { };
+            machines = {
+              "test-darwin-machine" = {
+                machineClass = "darwin";
+              };
+            };
+          };
         };
         systems = import systems;
         imports =

lib/modules/clan/module.nix

@@ -51,9 +51,7 @@ let
 
   allMachines = config.clanInternals.inventoryClass.machines; # <- inventory.machines <- clan.machines
 
-  machineClasses = lib.mapAttrs (
+  machineClasses = lib.mapAttrs (name: _: inventory.machines.${name}.machineClass) allMachines;
-    name: _: inventory.machines.${name}.machineClass
-  ) allMachines;
 
   configurations = lib.mapAttrs (
     name: _:

machines/test-darwin-machine/configuration.nix

@@ -0,0 +1,7 @@
+{
+  # Basic system configuration
+  system.stateVersion = 5;
+
+  # Set the nixpkgs system
+  nixpkgs.hostPlatform = "aarch64-darwin";
+}