How to have build system type and host system type as expected?

[Hung Nguyen Gia <gh_origin%zohomail.com@localhost>]

Still stuck. This is the error message:

===> Patching for cwrappers-20180325
===> Creating toolchain wrappers for cwrappers-20180325
===> Configuring for cwrappers-20180325
=> Configuring and building libnbcompat
checking build system type... x86_64-unknown-midnightbsd2.0.3
checking host system type... config.sub: invalid option -unknown-freebsd11.4
Try `config.sub --help' for more information.
configure: error: /bin/sh ./config.sub -unknown-freebsd11.4 failed
*** Error code 1

Stop.
bmake[1]: stopped in /usr/home/gh/pkgsrc/pkgtools/cwrappers
*** Error code 1

Stop.
bmake: stopped in /usr/home/gh/pkgsrc/pkgtools/cwrappers
===> exited with status 1
aborted.

Here is the lines I added in bsd.prefs.mk:

.elif ${OPSYS} == "MidnightBSD"
OS_VERSION=             11
MACHINE_PLATFORM=       FreeBSD-${OS_VERSION}-${MACHINE_ARCH}
NATIVE_MACHINE_PLATFORM=${MACHINE_PLATFORM}
LOWER_OPSYS?=           freebsd
LOWER_OPSYS_VERSUFFIX=  11.4
.  if ${MACHINE_ARCH} == "i386"
LOWER_VENDOR?=          pc
.  endif
LOWER_VENDOR?=          unknown

The expected build system type and host system type both are x86_64-unknown-freebsd11.4

Please help. Thanks.