run a Lil script using a nix-shell shebang

greet.lil

#!/usr/bin/env nix-shell
#! nix-shell -p decker
#! nix-shell -i lilt

sys.seed:sys.ms

on greet do
  greetings: insert exclamation object with
    "Ciao"  "bella"
    "Hello" "world"
    "Moin"  "Leude"
  end
  "%[exclamation]s %[object]s!" format random[greetings]
end

print[greet[]]