bug#25258: Bashisms in make rules

[Vincent Legoll]

Hello,

Having done a few bashismectomies lately (in guix-install.sh), I
can sympathetize with you.

I don't know guix team's stance on that kind ow work (I still have not
polished my work enough for review). But it looks like you stumbled on
some painful items, that ought to be resolved one way or the other.

It would be nice to hear that those are actionable items that will
receive positive feedback before doing substantial work. (Looks like
I should have asked that earlier, before falling into the rabbit
hole...)

I personally think we should try to support using guix as widely as
possible/practical on foreign distros.

So, WDGCT (What Do Guix Core Think) ?

Thanks

--
Vincent Legoll