root@s19314357:~# curl https://install.sandstorm.io | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 81940  100 81940    0     0  65834      0  0:00:01  0:00:01 --:--:-- 65868
*** INSTALLATION FAILED ***

Your kernel does not appear to be compiled with support for unprivileged user
namespaces (CONFIG_USER_NS=y), or something else is preventing creation of user
namespaces. This feature is critical for sandboxing. Read more at:
https://docs.sandstorm.io/en/latest/administering/faq/#enabling-user-namespaces

Hmm, installation failed. Would it be OK to send an anonymous error report to the sandstorm.io team so we know something is wrong?
It would only contain this error code: E_NO_USERNS [yes]
Sending problem report...
... problem reported successfully. Your installation did not succeed.

You can report bugs at: http://github.com/sandstorm-io/sandstorm