trafgen build issues

>>> netsniff-ng: Cleaning temporary build dirs...
>>> netsniff-ng: Checking sha512sums...
netsniff-ng-0.6.3.tar.gz: OK
fortified-headers.patch: OK
>>> netsniff-ng: Unpacking /var/cache/distfiles/netsniff-ng-0.6.3.tar.gz...
>>> netsniff-ng: fortified-headers.patch
patching file built_in.h
patching file csum.h
patching file link.c
[*] Checking compiler gcc ... [YES]
[*] Checking linker gcc ... [YES]
[*] Checking pkg-config ... [YES]
[*] Checking flex ... [YES]
[*] Checking bison ... [YES]
[*] Checking nacl ... [YES]
[*] Checking libnl ... [YES]
[*] Checking libnl-route ... [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!
Building netsniff-ng toolkit (0.6.3+) for x86_64-alpine-linux-musl:
Building netsniff-ng:
  CC	dissector.c
  CC	dissector_sll.c
  CC	dissector_eth.c
  CC	dissector_80211.c
  CC	dissector_netlink.c
  CC	lookup.c
  CC	proto_arp.c
  CC	proto_ethernet.c
  CC	proto_icmpv4.c
  CC	proto_icmpv6.c
  CC	proto_igmp.c
  CC	proto_ip_authentication_hdr.c
  CC	proto_ip_esp.c
  CC	proto_ipv4.c
  CC	proto_ipv6.c
  CC	proto_ipv6_dest_opts.c
  CC	proto_ipv6_fragm.c
  CC	proto_ipv6_hop_by_hop.c
  CC	proto_ipv6_in_ipv4.c
  CC	proto_ipv6_mobility_hdr.c
  CC	proto_ipv6_no_nxt_hdr.c
  CC	proto_ipv6_routing.c
  CC	proto_lldp.c
  CC	proto_none.c
  CC	proto_tcp.c
  CC	proto_udp.c
  CC	proto_vlan.c
  CC	proto_vlan_q_in_q.c
  CC	proto_mpls_unicast.c
  CC	proto_80211_mac_hdr.c
  CC	privs.c
  CC	proc.c
  CC	dev.c
  CC	str.c
  CC	sig.c
  CC	sock.c
  CC	irq.c
  CC	iosched.c
  CC	ioops.c
  CC	link.c
  CC	xmalloc.c
  CC	hash.c
  CC	bpf.c
  CC	pcap_rw.c
  CC	pcap_sg.c
  CC	pcap_mm.c
  CC	ring_rx.c
  CC	ring_tx.c
  CC	ring.c
  CC	tprintf.c
  CC	timer.c
  CC	die.c
  CC	sysctl.c
  CC	netsniff-ng.c
  CC	bpf_comp.c
  CC	geoip.c
  CC	tstamping.c
  CC	mac80211.c
  CC	proto_nlmsg.c
  LD	netsniff-ng
Building trafgen:
  LEX	trafgen_lexer.l
  YAAC	trafgen_parser.y
  CC	xmalloc.c
  CC	die.c
  CC	ioops.c
  CC	privs.c
  CC	proc.c
  CC	dev.c
  CC	irq.c
  CC	link.c
  CC	str.c
  CC	sig.c
  CC	sock.c
  CC	ring_tx.c
  CC	ring.c
  CC	timer.c
  CC	sysctl.c
  CC	cpp.c
In file included from cpp.c:7:0:
proc.h:11:31: error: unknown type name 'ino_t'
 extern int proc_find_by_inode(ino_t ino, char *cmdline, size_t len, pid_t *pid);
                               ^~~~~
proc.h:11:69: error: unknown type name 'pid_t'
 extern int proc_find_by_inode(ino_t ino, char *cmdline, size_t len, pid_t *pid);
                                                                     ^~~~~
proc.h:12:25: error: unknown type name 'pid_t'
 extern bool proc_exists(pid_t pid);
                         ^~~~~
make: *** [Makefile:185: trafgen/cpp.o] Error 1
>>> ERROR: netsniff-ng: all failed