Le vendredi 12 mars 2021 à 17:53 +0100, e...@beaver-labs.com a écrit : > (apply invoke "7z" "e" (assoc-ref %build-inputs "patch- > data") > (map (cut format "quake3-latest- > pk3s/baseq3/pak~a.pk3" <>) > (iota 8 1)))
Hello Edouard, The first argument to format is the port where to write the formatted text to, or #f to return as a string. So you want to pass #f as the first argument to format, unless you use srfi-28, in which case you need to add (use-modules (srfi srfi-28)) https://www.gnu.org/software/guile/manual/guile.html#SRFI_002d28 Hope it helps you!