What do you think about literate programming [1,2,3]?

I've never tried it, but I like the idea.  WEB and Noweb look a bit
outdated, but there is also Babel [4,5,6].

Would you like to give it a try?  If so, we can start with
'guix-package' and 'guix-build' because they are already documented.

[1] https://en.wikipedia.org/wiki/Literate_programming
[2] http://www-cs-faculty.stanford.edu/~uno/lp.html
[3] http://www.cs.tufts.edu/~nr/noweb/intro.html
[4] http://orgmode.org/worg/org-contrib/babel/intro.html#literate-programming
[5] http://orgmode.org/worg/org-contrib/babel/how-to-use-Org-Babel-for-R.html
[6] http://kimavcrp.blogspot.com/2012/05/literate-programming-in-clojure-table.html