tschwinge once was testing this (years ago), and found it didn't work. Perhaps the protocol was extended?
IRC, freenode, #hurd, 2012-12-20
<youpi> if somebody has time to spend, building the nbd package makes pfinet crash
IRC, freenode, #hurd, 2012-12-21
<youpi> (in the testsuite)
Platform-specific Error Values in the Wire Protocol
See, for example, the threads starting at