1 {

     2   nixpkgs ? import (fetchGit {

     3     url = "https://github.com/NixOS/nixpkgs";

     4     ref = "release-25.05";

     5   }) {},

     6   nixpkgs-unstable ? import (fetchGit {

     7     url = "https://github.com/NixOS/nixpkgs";

     8     ref= "nixpkgs-unstable";

     9   }) {},

    10 }:

    11 nixpkgs.mkShell {

    12   # nativeBuildInputs is usually what you want -- tools you need to run

    13   nativeBuildInputs = [

    14     nixpkgs.nodejs

    15     nixpkgs.php

    16     nixpkgs.dbeaver-bin

    17     nixpkgs.mercurial

    18     nixpkgs-unstable.claude-code

    19   ];

    20 }