fix: replace defaultApp with apps.default

Author: portothree

flake.nix

@@ -8,18 +8,14 @@
 
   outputs = { self, flake-utils, nixpkgs }:
     flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = nixpkgs.legacyPackages.${system};
-      in
-      rec {
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in rec {
         packages.gradle2nix = import ./default.nix { inherit pkgs; };
         defaultPackage = packages.gradle2nix;
 
-        apps.gradle2nix = {
+        apps.default = {
           type = "app";
           program = "${packages.gradle2nix}/bin/gradle2nix";
         };
-        defaultApp = apps.gradle2nix;
-      }
-    );
+      });
 }