group packages in attrset literal

This will make generating packages for cross possible.

flake.nix

@@ -71,9 +71,10 @@
       };
     in
     {
-      packages.default = package pkgsHost;
+      packages = {
+        default = package pkgsHost;
 
-      packages.oci-image =
+        oci-image =
         let
           package = self.packages.${system}.default;
         in
@@ -81,8 +82,8 @@
           name = package.pname;
           tag = "latest";
           config = {
-          # Use the `tini` init system so that signals (e.g. ctrl+c/SIGINT) are
-          # handled as expected
+            # Use the `tini` init system so that signals (e.g. ctrl+c/SIGINT)
+            # are handled as expected
             Entrypoint = [
               "${pkgsHost.lib.getExe' pkgsHost.tini "tini"}"
               "--"
@@ -92,6 +93,7 @@
             ];
           };
         };
+      };
 
       devShells.default = pkgsHost.mkShell {
         env = env pkgsHost // {