Introduce nix-on-droid base config

home/base/nix-on-droid/default.nix

@@ -0,0 +1,27 @@
+{ config, lib, ... }:
+
+with lib;
+
+let
+
+  cfg = config.custom.base.nix-on-droid;
+
+in
+
+{
+  options = {
+    custom.base.nix-on-droid = {
+      enable = mkEnableOption "NixOnDroid";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    custom.base = {
+      nix.enableStoreOptimization = false;
+      non-nixos = {
+        enable = true;
+        installNix = false;
+      };
+    };
+  };
+}

home/roles/mobile/default.nix

@@ -25,13 +25,7 @@ in
     };
 
     custom = {
-      base = {
-        nix.enableStoreOptimization = false;
-        non-nixos = {
-          enable = true;
-          installNix = false;
-        };
-      };
+      base.nix-on-droid.enable = true;
 
       programs.ssh = {
         enable = true;