The ftape and zftape zft-compressor modules load just fine - but the bpck modules gives two unresolved symbols. The first is pi_register and the other is pi_unregister. There are no bpck-fdc or ftape-internal modules. These existed for 5.2
This issue has been forwarded to a developer for further action.
bpck.o depends on paride.o. Apologies for the late response.