{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/23.05";
  };

  outputs = { self, nixpkgs }:
    let pkgs = nixpkgs.legacyPackages.x86_64-linux;
    in {
      packages.x86_64-linux.hello = pkgs.hello;
      devShells.x86_64-linux.hello = pkgs.mkShell {
        buildInputs = [ self.packages.x86_64-linux.hello ];
      };
    };
}