helper script

modules/hosts/computer-mo/nixos-configurations.nix

@@ -1,15 +1,12 @@
-{ inputs, ... }: {
-  flake.nixosConfigurations.computer-mo = inputs.nixpkgs.lib.nixosSystem {
-    system = "x86_64-linux";
-    specialArgs = {
+{ inputs, ... }:
+let
+  mkHost = inputs.self.lib.mkHost;
+in
+{
+  flake.nixosConfigurations = {
+    computer-mo = mkHost {
       user = "mo";
-      pkgs-unstable = import inputs.nixpkgs-unstable {
-        system = "x86_64-linux";
-        config.allowUnfree = true;
+      extraModules = [ inputs.self.nixosModules.computer-mo ];
     };
   };
-    modules = [
-      inputs.self.nixosModules.computer-mo
-    ];
-  };
 }

modules/platform/mkhost.nix

@@ -0,0 +1,14 @@
+{ inputs, ... }: {
+  flake.lib.mkHost = { system ? "x86_64-linux", user, extraModules ? [] }:
+    inputs.nixpkgs.lib.nixosSystem {
+      inherit system;
+      specialArgs = {
+        inherit user;
+        pkgs-unstable = import inputs.nixpkgs-unstable {
+          inherit system;
+          config.allowUnfree = true;
+        };
+      };
+      modules = extraModules;
+    };
+}