I'm not sure I'm parsing your comment correctly; I'm reading it as you asking if this works because you're worried that travis-artifacts shouldn't be on the path.

It seemed to run travis-artifacts in https://travis-ci.org/mozilla-b2g/gaia-email-libs-and-more/builds/16962616# (which unfortunately was not a main-branch commit, so the secret keys didn't decrypt)

Note that we do "gem install travis-artifacts" above, which is probably why it's on the path.  I just slavishly followed the blog page on what to do.

Also note that I haven't seen things actually properly work yet, because now is the one time builds aren't failing!