==================
nix-shell with a bash payload
==================

#!/usr/bin/env nix-shell
#!nix-shell -i bash
echo "hello, world!"
---

(source_file
  (first_line
    (shebang_open)
    (opt_ws)
    (env)
    (ws)
    (nix_shell))
  (next_line
    (newline)
    (annotation_line
      (shebang_open)
      (opt_ws)
      (nix_shell)
      (nix_shell_args)))
  (next_line
    (newline)))