vm: make it x86_64-linux only

flake.nix

@@ -141,14 +141,15 @@
       };
 
       formatter = pkgs.alejandra;
-
+    })
+    // {
       nixosConfigurations.vm = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
           "${nixpkgs}/nixos/modules/virtualisation/qemu-vm.nix"
           ./vm.nix
-          e11sync-module
+          self.nixosModules.x86_64-linux.e11sync
         ];
       };
-    });
+    };
 }

pkgs/e11sync-backend.nix

@@ -13,7 +13,7 @@
   geoip-mmdb,
 }:
 stdenv.mkDerivation {
-  name = "e11sync";
+  name = "e11sync-backend";
   propagatedBuildInputs = [
     (python3.withPackages
       (ps: [