Should be a separate git repository, on gerrit, that contains all the wheels required to run ORES. See https://phabricator.wikimedia.org/T128110#2082243 for instructions on building these.
Note that they should be built on a machine with similar config to the final resting place, and hence should be a clean jessie labs box. We've set up ores-compute-01.eqiad.wmflabs specifically to be a "production-like" env. for this use.