If you ran the Bootstrap script, this is what you would have gotten as the error:

Fetched 1,035 kB in 1s (959 kB/s) Reading package lists... Reading package lists... Building dependency tree... Reading state information... ca-certificates is already the newest version (20160104ubuntu1). apt-transport-https is already the newest version (1.3.2ubuntu0.1). apt-transport-https set to manually installed. 0 upgraded, 0 newly installed, 0 to remove and 10 not upgraded. Reading package lists... Building dependency tree... Reading state information... E: Unable to locate package gnupg-curl * ERROR: Failed to run install_ubuntu_stable_deps()!!!