FTR that error (which should've been tanking all recent fab builds) was due to a change in paramiko master, #22, which I did just go fix such that the test suite passes for me.
Restarted the Travis job and at least one of the cells passes now, so yay for that.
Backported as discussed, hopefully this will autoclose. EDIT: right, nope, because cherry picking. Plz 2 apply black magic there github? :D