tags:: nixos

```bash
nix-shell -E '
let
  pkgsA = (import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/141439f6f11537ee349a58aaf97a5a5fc072365c.tar.gz) {});
  pkgsB = (import (builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/7d7622909a38a46415dd146ec046fdc0f3309f44.tar.gz) {});
in
pkgsA.mkShell {
  buildInputs = [
    pkgsA.ktlint
    pkgsB.jq
  ];
}'
```