tcpdump expects to include <pcap.h> & <pcap-namedb.h>, but libpcap doesn't install them... How the Hell did you come to that conclusion? root@duality [2]; cd /usr/src/lib/libpcap root@duality [2]; make -n install cd /build/src/lib/libpcap; for i in pcap.h pcap-namedb.h; do cmp -s $i /usr/include/$i || { j="install -c -o bin -g bin -m 444 $i /usr/include"; echo $j; $j; } done [...]