How can I use an older plugin in standalone mode?

[amalgame21]

I noticed that if I want the latest plugin and neovim, I have to use standalone. (#1377)
I installed neorg today and find that it displayed a lot of red error on the screen when I open a .norg file.
I found an issue about neorg on #1395, so it may be caused by the latest breaking change.
I want to use the plugins.neorg.package to use the nixos-23.11 versoin of neorg to test it out. How can I do that?
I configure nixvim as a flake in a repo named mynixvimrepo, and put it in my NixOS flake inputs, and then installed it by environment.systemPackages = with pkgs; [ inputs.mynixvimrepo.packages.${system}.default ];
Thanks for your help!

[amalgame21]

I figured it out.

1. add nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-23.11"; in flake input
2. add pkgs-stable = import nixpkgs-stable {inherit system;}; in flake output, add pkgs-stable in extraSpecialArgs
3. use plugins.neorg.package = pkgs-stable.vimPlugins.neorg; to use stable neorg.