created mkHost and mkHomeConfiguration

aspects/hosts/trantor.nix

@@ -1,31 +1,18 @@
-{ inputs, lib, ... }:
-{
-  flake.nixosConfigurations.trantor = inputs.nixpkgs-stable.lib.nixosSystem {
-    system = "aarch64-linux";
-    specialArgs = { inherit inputs; };
-    modules = [
-      inputs.agenix.nixosModules.default
-      { networking.hostName = "trantor"; }
-      {
-        nixpkgs.overlays = [
-          inputs.agenix.overlays.default
-          inputs.self.overlays.default
-        ];
-      }
-      ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_trantor)
-      (inputs.self.factory.ephemeral {
-        rootDevice = "/dev/disk/by-id/scsi-360b207ed25d84372a95d1ecf842f8e20-part2";
-      })
-    ]
-    ++ (with inputs.self.modules.nixos; [
-      # system aspects
-      base
-      cli
-      server
+{ inputs, ... }:
 
-      # user aspects
-      user
-      root
-    ]);
+let
+  mkHost = inputs.self.lib.mkHost;
+in
+
+{
+  flake.nixosConfigurations.trantor = mkHost {
+    hostname = "trantor";
+    system = "aarch64-linux";
+    nixpkgs = inputs.nixpkgs-stable;
+    ephemeral = "/dev/disk/by-id/scsi-360b207ed25d84372a95d1ecf842f8e20-part2";
+    extraModules = with inputs.self.modules.nixos; [
+      # base aspects
+      server
+    ];
   };
 }