How to use `nix develop` in the new `nix` style shebang

[roberth]

Problem

https://nix.dev/manual/nix/2.28/command-ref/new-cli/nix#shebang-interpreter shows a nix shell example.
Another important use case for it is nix develop, but this is somewhat tricky to use.
An example should show a valid nix develop shebang that users can start with.

Incidentally, it seems that without it, they have a good chance of setting off a fork bomb. Yay.

Proposal

1. Add a nix develop shebang example to https://nix.dev/manual/nix/2.28/command-ref/new-cli/nix#shebang-interpreter

2. Add a link or example on the nix develop page

Checklist

• checked latest Nix manual (source)
• checked open documentation issues and pull requests for possible duplicates

---

Add 👍 to issues you find important.