Created attachment 398626 [details] sys-block:nbd-3.9.1:20150310-191656.log Apparently running make in gznbd/ doesn't do what it used to.
should be all set now in the tree; thanks for the report! Commit message: Switch gznbd handling to the new configure flag http://sources.gentoo.org/sys-block/nbd/nbd-3.9.1.ebuild?r1=1.1&r2=1.2