*.pkg.el seem to be used by emacs  package.el,  which can not be compile without warn. I can not find the document.
this need to be verify.

At 2017-04-19 17:23:24, "Arun Isaac" <arunisaac@systemreboot.net> wrote: > >tumashu writes: > >> What about package-pkg.el file?. > >What about it? I am not familiar with this file. Could you please >elaborate? > > >