Hi, Hartmut Goebel skribis: > * gnu/packages/chicken.scm (chicken-srfi-37): New variable. [...] > + (home-page "https://wiki.call-cc.org/egg/srfi-37") > + (synopsis "SRFI-37 command-line option parsing for Chicken scheme") > + (description "This package provides SRFI-37, a simple and flexible > +command-line option parsing facility, for Chicken scheme.") > + (license (license:non-copyleft home-page)))) ;; TODO: refine It carries the SRFI license, which is non-free (Philip McGrath stumbled upon a similar issue with Racket¹). So this package cannot be included. There exist free implementations of SRFI-37 though, such as that of Guile, so one option would be to come up with a separate egg released under a free license. I realize that may be more work than you were expecting, but I expecting porting this module from Guile (say) to CHICKEN to be within reach. Thanks, Ludo’. ¹ https://lists.gnu.org/archive/html/guix-devel/2021-10/msg00220.html