Yes I did realize that later 
thanx for the tip anyway.
(edit)
Well, I just remembered why I thought I had to fork the library: Build wouldn’t import it at all, I was getting this error message, and followed ScruffR’s advice (in a sense), by making sure that the infos in the spark.json file were indeed matching the content of the firmware folder.
Then when I attempted to import it again in Build everything went smooth.