{
  description = "install-system package and shell environment";

  inputs = {
    nixpkgs.url  = "github:nixos/nixpkgs/nixos-25.05";
  };

  outputs = { self, nixpkgs, ... }: let
    pkgs = nixpkgs.legacyPackages.x86_64-linux.pkgs;
    name = builtins.baseNameOf (builtins.toString ./.);
    shellApplication = pkgs.writeShellApplication {
      inherit name;

      text = builtins.readFile ./${name}.sh;

      runtimeInputs = with pkgs; [
        coreutils
        gnused
        unixtools.column
      ];
    };
  in {
    packages.x86_64-linux.default = shellApplication;

    devShells.x86_64-linux.default = pkgs.mkShell {
      packages = [ shellApplication ];
    };
  };
}