Hi Guillaume and Sharlatan, Guillaume Le Vaillant writes: [...] > Concerning point 1, there's a modified version of the code from > "On Lisp" at . > The file "on-lisp.asd" contains an extra indication by Paul Graham about > the license: > > --8<---------------cut here---------------start------------->8--- > Original code: > This code is copyright 1993 by Paul Graham, but anyone who wants > to use the code in any nonprofit activity, or distribute free > verbatim copies (including this notice), is encouraged to do so. > > Modified code: > As long as you tell people it's modified and link to > the original, that's fine. --pg > --8<---------------cut here---------------end--------------->8--- Unfortunately AFAIU the "Modified code" license addition (where does it comes from?) still does not qualify the license as free. "On Lisp" official page is here: http://www.paulgraham.com/onlisptext.html, book and code (mechanically extracted from the TeX source files of _On Lisp_) is copyright by Paul Graham. AFAIU today both the code and the book are freeware but not free. The original code (officially linked in the book web page) is here: https://sep.yimg.com/ty/cdn/paulgraham/onlisp.lisp?t=1595850613& A good chance to ask Paul Graham (and Dalek Baldwin... or Kyle Littler?) to release the code as free software? :-D Thanks! Giovanni. P.S.: I'm not familiar with Common Lisp but is it possible that the functions from "On Lisp" has been somehow replaced or incorporated in a proper library? ...I'm going to ask on guix-devel. This alone will not fix the problem with "point 3." of the Weir license, but would be a start. -- Giovanni Biscuolo Xelera IT Infrastructures