As Dominique mentioned, policy for the official build daemon machines forbids
network access from the build. So, a while back, I asked around for some
other machines to use for nightly builds. I got a couple of offers of a login,
but I lacked the time to set up and maintain the nightly.
The other hard truth is that having a nightly build is not enough. Each
architecture needs a champion who will investigate the failures, do extra
testing or develop patches. The ITK community won't do it on their own. Even
with a nightly build submitted to cdash.
I'm willing to help out with advice but I simply lack the time to do very much
follow-up for non-mainstream architectures. Truthfully, I don't have much
time even for amd64 so more blood for Debian packaging would be welcome!