PineTabv: Cross build maybe?

flake.nix

@@ -58,12 +58,19 @@
           }];
         };
       in nixpkgs-stable.lib.nixosSystem {
+        system = "x86_64-linux";
         specialArgs = {
           inputs = attrs;
         };
         modules = [
           ./machines/ptv/configuration.nix
           patch-8gb
+          {
+            nixpkgs.crossSystem = {
+              config = "riscv64-unknown-linux-gnu";
+              system = "riscv64-linux";
+            };
+          }
         ];
       };
     };