{ pkgs ? import <nixpkgs> {} }:
/* https://githubhot.com/repo/NixOS/nixops/issues/1490?page=2 */
with pkgs;
let packs = [
   (pkgs.nixopsUnstable.override {
     ## https://github.com/NixOS/nixops/issues/1490
     overrides = (self: super: {
       nixops = super.nixops.overridePythonAttrs (
         _: {
           src = pkgs.fetchgit {
             url = "https://github.com/nixos/nixops";
             rev = "35ac02085169bc2372834d6be6cf4c1bdf820d09";
             sha256 = "1jh0jrxyywjqhac2dvpj7r7isjv68ynbg7g6f6rj55raxcqc7r3j";
           };
         }
       );
     });
   })
 ];
in mkShell {
    # nativeBuildInputs is usually what you want -- tools you need to run
    nativeBuildInputs = packs;  /* -- [ nixopsUnstable nixos-generators ] */
}