Netsniff depends on some libraries. If you use Debian the following list should build a feature complete netsniff-ng

libgeoip-dev
libcli-dev
libnl-cli-3-dev
libnl-nf-3-dev
libnl-3-dev
libnet1-dev
libnacl-dev
liburcu-dev
libnetfilter-conntrack-dev

Resulting in the following configure line:

[*] Checking pkg-config ... [YES]
[*] Checking ccache ... [NO]
[*] Checking flex ... [YES]
[*] Checking bison ... [YES]
[*] Checking nacl ... [YES]
[*] Checking libnl ... [YES]
[*] Checking tpacket_v2 ... [YES]
[*] Checking tpacket_v3 ... [YES]
[*] Checking libnetfilter-conntrack ... [YES]
[*] Checking ncurses ... [YES]
[*] Checking libGeoIP ... [YES]
[*] Checking libz ... [YES]
[*] Checking liburcu ... [YES]
[*] Checking libpcap ... [YES]
[*] Checking hw timestamping ... [YES]
[*] Checking libcli ... [YES]
[*] Checking libnet ... [YES]
[*] Generating config.h ...
[*] Looks good! All tools will be built!