Installations via ssh fails

When I try to install this I get

Resolving (…
Connecting to (||:443… connected.
ERROR: The certificate of' is not trusted. ERROR: The certificate of’ hasn’t got a known issuer.

I can find similar problems reported on the forum, but no fix that works for me (RPi time is correct)

Same problem here!

The cert looks ok to me. Can you check your DNS and maybe try for DNS?

Problem found, I didn’t realise that I was running an old wheezy installation.
After upgrading to jessie the install script runs just fine.

Interesting. I wonder if one of the root certs wasn’t updating and causing a certificate error? Either way thanks for reporting back!