Comment # 12 on bug 949510 from Takashi Iwai

(In reply to Luis Rodriguez from comment #9)
> > > I *think* leap 42.1 source repo should be at:
> > > 
> > > http://download.opensuse.org/distribution/leap/42.1/repo/src-oss
> > > 
> > > but that doesn't exist, so we need that. Takashi do you what it is?
> > 
> > The source rpms of Leap packages are found in a different URL,
> >   http://download.opensuse.org/source/distribution/leap/42.1/repo/oss/
> 
> I had tried that and it didn't seem to work as a repo url, so I was not sure
> what was the right one. The one I am looking for would enable the user to
> use zypper si -d to install build-dependencies.

It works on my machine, and actually the source repo has been existing from the
beginning, but it's not enabled as default.  You need to turn it on at first,
do refresh, then do si (all as root).
  zypper mr -e repo-source
  zypper ref repo-source
  zypper si -d wpa_supplicant