Example of how to run GNU Guile scripts using nix-shell. 🙂

ekko.scm

#! /usr/bin/env nix-shell
#! nix-shell -i 'guile -e main' -p guile
!#

;; The following code is from:
;; https://www.gnu.org/software/guile/manual/html_node/The-Meta-Switch.html

(define (main args)
  (map (lambda (arg) (display arg) (display " "))
       (cdr args))
  (newline))