nix-shell-multi-line.sh

#!/usr/bin/env nix-shell
#!nix-shell -p ruby
#!nix-shell -p python
#!nix-shell -p hello
#!nix-shell -i bash
for b in $buildInputs; do
        echo $b
done

test.rb

#!/usr/bin/env nix-shell
#!nix-shell -i ruby

require "pp"
pp ENV["buildInputs"].split(" ")

# Wait what?
# The definition can be split??!?
#!nix-shell -p hello ruby
# vim: ft=ruby