tcpcopy 0.6.3 relies on ip_queue support that has been removed from the Linux kernel >= 3.5.0.
tcpcopy 0.7.0+ knows about nfqueue for kernels >= 3.5.0. The current version of tcpcopy is 1.0.0 released 03.08.2015. I suggest removing this old version from testing / sid. (It will be auto-removed due to the RC bug from Stretch.) NB1: intercept and tcpcopy have been split into separate repositories upstream. NB2: Ubuntu dropped the version 0.6.3 for the raring release (13.04), cf. LP: #1163290 (https://bugs.launchpad.net/ubuntu/+source/tcpcopy/+bug/1163290)
