{
  description = "My personal nix packages";

  inputs.nixpkgs.url = "https://mirrors.cernet.edu.cn/nix-channels/nixos-unstable/nixexprs.tar.xz";

  outputs = { self, nixpkgs }: let
    system = "x86_64-linux";
    myOverlay = import ./overlays/my-pkgs.nix;
    pkgs = import nixpkgs {
      inherit system;
      overlays = [ myOverlay ];
    };
  in {
    overlays = [ myOverlay ];
    packages.${system} = pkgs;
  };
}