I'm seeing this on Debian wheezy. Looks like libssl0.9.8 isn't available -- only libssl1.0.0. I'm using this as my apt source:
deb http://download.rethinkdb.com/apt lucid main
Is there a better wheezy package source?
The following NEW packages will be installed:
rethinkdb{b}
0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 14.3 MB of archives. After unpacking 39.1 MB will be used.
The following packages have unmet dependencies:
rethinkdb : Depends: libssl0.9.8 (>= 0.9.8k-1) which is a virtual package.
The following actions will resolve these dependencies:
Keep the following packages at their current version:
1) rethinkdb [Not Installed]
Sorry about that, it might take a bit of time to work out the kinks in the packaging (libssl is surprisingly finicky on different platforms). I have dispatched a message to the RethinkDB packaging genie (https://github.com/atnnn) and should be able to get an answer soon.
It's no longer compatible with jessie/sid either. precise and saucy versions depend on libprotobuf7 (wheezy has it too), trusty - on libprotobuf8 and jessie has libprotobuf9.