Arun Isaac <arunisaac@systemreboot.net> writes:

> You should be able to do this just using #:make-flags. See
> https://www.gnu.org/software/make/manual/html_node/Overriding.html

emacs-build-system seem to have no #:make-flags, I just use
"make var1=var1 all" instead.

the rest have been fixed, thanks!

the below is new patch: