The upstream is quite: https://github.com/gongo/json-reformat/issues/33

>> Besides, I wonder: shouldn’t ‘emacs-build-system’ define the
>> ‘EMACSLOADPATH’ env. var. so we don’t have to carry all these -L flags?
>> Is there any downside?

As I see from the documentation¹ EMACSLOADPATH is a list of directories
with *.el files in it.  If we will use it, then it will be almost the
same carring bunch of directories in package recipes, will it?

¹ https://www.gnu.org/software/emacs/manual/html_node/emacs/General-Variables.html

Oleg.