unify home-manager configurations of workmac and main laptop

- manually inspected changes of "workmac" branch
- modularised out some config parts into modules

flake.nix

@@ -66,19 +66,17 @@
         };
       mkHomeManager =
         confName: user: system: # unfortunately, home-manager configs are still system-specific
-        # FIXME: this is thus still linux-x86_64 specific
         home-manager.lib.homeManagerConfiguration {
           pkgs = nixpkgs.legacyPackages.${system};
           modules = [
             {
               imports = [
                 nur.hmModules.nur
-                # TODO: $name can be utilised to conditionally load other config files
-                ./home/home.nix
+                ./home/common.nix
+                ./home/${confName}.nix
               ];
               # extends the home config
               home.username = user;
-              home.homeDirectory = "/home/${user}";
             }
           ];
           # Optionally use extraSpecialArgs
@@ -108,7 +106,13 @@
           lanzaboote.nixosModules.lanzaboote
         ];
       };
-      homeConfigurations.spiollinux = mkHomeManager "spiollinux" "spiollinux" systems.x86_64-linux;
+      homeConfigurations = {
+        spiollinux-desktop = mkHomeManager "desktop" "spiollinux" systems.x86_64-linux;
+        os-workmac = mkHomeManager "workmac" "os" systems.aarch64-darwin;
+      };
+      lib = {
+        inherit mkHomeManager;
+      };
     }
     // utils.lib.eachDefaultSystem (
       system: