ntp-4.2.8p3 Stable configure error

checking for a BSD-compatible install... /sw/bin/ginstall -c
checking whether build environment is sane... yes
/Volumes/Install/NTP/ntp-4.2.8p3/sntp/libevent/build-aux/missing: Unknown `--is-lightweight' option
Try `/Volumes/Install/NTP/ntp-4.2.8p3/sntp/libevent/build-aux/missing --help' for more information
configure: WARNING: 'missing' script is too old or missing
checking for a thread-safe mkdir -p... /sw/bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking build system type... x86_64-apple-darwin14.4.0
checking host system type... x86_64-apple-darwin14.4.0
checking for style of include used by make... GNU