On Mon, May 20, 2013 at 09:27:51PM +0200, Jordi Guillaumes i Pons wrote: Add also: OS_CCDEFS += -I/usr/local/include I just remembered I had to do the same to get vde caught in the macOS build. That did the trick! VAX simulator V3.9-0 sim> attach xq vde:/tmp/switch1 libpcap version 1.2.1 Eth: opened OS device vde:/tmp/switch1 sim> Now to beat dynamips about the head until it works with VDE. -brian