Update flake.nix

flake.nix

@@ -8,30 +8,30 @@
     nix-filter.url = "github:numtide/nix-filter";
   };
 
-  outputs = { self, nixpkgs, flake-utils, nix-cargo-integration, nix-filter }:
+  outputs = { self, nixpkgs, flake-utils, nix-cargo-integration, nix-filter, ... }@inputs:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs {
           inherit system;
           overlays = [ nix-cargo-integration.overlay ];
         };
 
-        filteredSrc = nix-filter.lib.filterSource {
+        src = nix-filter.lib.filterSource {
           src = ./.;
           filter = name: type: builtins.elem (baseNameOf name) [
-            "src" "Cargo.lock" "Cargo.toml" "rust-toolchain.toml"
-          ] || (type == "directory" && builtins.elem (baseNameOf name) [
-            "src"
-          ]);
+            "src", "Cargo.lock", "Cargo.toml", "rust-toolchain.toml"
+          ] || (type == "directory" && builtins.elem (baseNameOf name) ["src"]);
         };
-        
+
       in {
-        defaultPackage = pkgs.nci.buildPackage {
+        packages.hvm = pkgs.nci.buildPackage {
           name = "hvm";
-          src = filteredSrc;
+          src = src;
           cargoToml = "Cargo.toml";
           buildInputs = with pkgs; [ openssl pkg-config ];
         };
+
+        defaultPackage = self.packages.${system}.hvm;
       }
     );
 }