upgrade of mkvtoolnix fails during build/configure. Unable to find boost libraries

[TheLastLovemark]

This may be related to #59038.

The configure script runs its checks and fails when it comes to boost

checking for boostlib >= 1.49.0... yes
checking whether the Boost::System library is available... yes
configure: error: Could not find a version of the library!
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_mkvtoolnix/mkvtoolnix/work/mkvtoolnix-30.1.0" && ./configure --prefix=/opt/local --mandir=/opt/local/share/man --with-boost=/opt/local --with-extra-libs=/opt/local/lib --with-extra-includes=/opt/local/include --with-xsltproc=/opt/local/bin/xsltproc --with-docbook-xsl-root=/opt/local/share/xsl/docbook-xsl-nons --with-po4a=/opt/local/bin/po4a --with-po4a-translate=/opt/local/bin/po4a-translate --enable-qt --with-qmake=/opt/local/libexec/qt5/bin/qmake --with-moc=/opt/local/libexec/qt5/bin/moc --with-uic=/opt/local/libexec/qt5/bin/uic --with-rcc=/opt/local/libexec/qt5/bin/rcc 
Exit code: 1
Error: Failed to configure mkvtoolnix, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_mkvtoolnix/mkvtoolnix/work/mkvtoolnix-30.1.0/config.log
Error: Failed to configure mkvtoolnix: configure failure: command execution failed
DEBUG: Error code: NONE
DEBUG: Backtrace: configure failure: command execution failed
    while executing
"$procedure $targetname"
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_mkvtoolnix/mkvtoolnix/main.log for details.
DEBUG: Registry error: qt59-qtbase not registered as installed & active.

boost is installed:

$ port location boost
The following versions of boost are currently installed:
  boost @1.66.0_3+no_single+no_static+python27
  boost @1.66.0_4+no_single+no_static+python27
  boost @1.71.0_0+cmake_scripts+no_single+no_static+openmpi+python27+regex_match_extra (active)
  boost @1.71.0_0+no_single+no_static+python27
Error: port location failed: Registry error: Please specify the full version as recorded in the port registry.
$ port location boost @1.71.0_0+cmake_scripts+no_single+no_static+openmpi+python27+regex_match_extra
Port boost 1.71.0_0+cmake_scripts+no_single+no_static+openmpi+python27+regex_match_extra is installed as an image in:
/opt/local/var/macports/software/boost/boost-1.71.0_0+cmake_scripts+no_single+no_static+openmpi+python27+regex_match_extra.darwin_17.x86_64.tbz2

I tried running the call to the configure script manually and supplying the full path to boost, but that failed too:

# cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_mkvtoolnix/mkvtoolnix/work/mkvtoolnix-30.1.0" && ./configure --prefix=/opt/local --mandir=/opt/local/share/man ****--with-boost=/opt/local/include/boost**** --with-extra-libs=/opt/local/lib --with-extra-includes=/opt/local/include --with-xsltproc=/opt/local/bin/xsltproc --with-docbook-xsl-root=/opt/local/share/xsl/docbook-xsl-nons --with-po4a=/opt/local/bin/po4a --with-po4a-translate=/opt/local/bin/po4a-translate --enable-qt --with-qmake=/opt/local/libexec/qt5/bin/qmake --with-moc=/opt/local/libexec/qt5/bin/moc --with-uic=/opt/local/libexec/qt5/bin/uic --with-rcc=/opt/local/libexec/qt5/bin/rcc
checking build system type... x86_64-apple-darwin17.7.0
checking host system type... x86_64-apple-darwin17.7.0
checking target system type... x86_64-apple-darwin17.7.0
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc and cc understand -c and -o together... yes
checking how to run the C preprocessor... gcc -E
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking how to run the C++ preprocessor... g++ -E
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /opt/local/bin/ginstall -c
checking for ranlib... ranlib
checking for strip... strip
checking for ar... ar
checking for ld... ld
checking for strings... strings
checking for objdump... objdump
checking for pkg-config... /opt/local/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for grep that handles long lines and -e... /opt/local/bin/ggrep
checking for egrep... /opt/local/bin/ggrep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for inttypes.h... (cached) yes
checking for stdint.h... (cached) yes
checking for sys/types.h... (cached) yes
checking sys/syscall.h usability... yes
checking sys/syscall.h presence... yes
checking for sys/syscall.h... yes
checking stropts.h usability... no
checking stropts.h presence... no
checking for stropts.h... no
checking for vsscanf... yes
checking for syscall... yes
checking compiler type and version... gcc 8.3.0
checking for support for the "-std=c++14" flag... -std=gnu++14
checking for support for C++11 feature "initializer lists"... yes
checking for support for C++11 feature "range-based 'for'"... yes
checking for support for C++11 feature "right angle brackets"... yes
checking for support for C++11 feature "'auto' keyword"... yes
checking for support for C++11 feature "lambda functions"... yes
checking for support for C++11 feature "nullptr"... yes
checking for support for C++11 feature "tuples"... yes
checking for support for C++11 feature "alias declarations"... yes
checking for support for C++14 feature "std::make_unique"... yes
checking for support for C++14 feature "digit separators"... yes
checking for support for C++14 feature "binary literals"... yes
checking for support for C++14 feature "generic lambdas"... yes
checking for support for C++14 feature "User-defined literals for std::string"... yes
checking whether the byte order is big-endian... no
checking if being compiled with mingw32... no
checking for int64_t... yes
checking for uint64_t... yes
checking size of int... 4
checking size of long... 8
checking size of long long... 8
checking for PRId64 and PRIu64... yes
checking iconv.h usability... yes
checking iconv.h presence... yes
checking for iconv.h... yes
checking for iconv... yes
checking for iconv declaration... 
         extern size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
checking for nl_langinfo... yes
checking for ogg_sync_init in -logg... yes
checking ogg/ogg.h usability... yes
checking ogg/ogg.h presence... yes
checking for ogg/ogg.h... yes
checking for vorbis_synthesis_init in -lvorbis... yes
checking vorbis/codec.h usability... yes
checking vorbis/codec.h presence... yes
checking for vorbis/codec.h... yes
checking for FLAC__stream_decoder_new in -lFLAC... yes
checking for FLAC__StreamMetadata_StreamInfo.sample_rate... yes
checking for FLAC__stream_decoder_skip_single_frame in -lFLAC... yes
checking for EBML... yes
checking for MATROSKA... yes
checking if libEBML contains FindNextChild... yes
checking pugixml.hpp usability... yes
checking pugixml.hpp presence... yes
checking for pugixml.hpp... yes
checking for main in -lpugixml... yes
configure: Using the system version of the pugixml library
checking nlohmann's json-cpp... no
configure: Using the internal version of nlohmann json-cpp
checking utf8.h usability... no
checking utf8.h presence... no
checking for utf8.h... no
configure: Using the internal version of UTF8-CPP
checking fmt... no
configure: Using the internal version of fmt
checking for ZLIB... yes
checking for moc... using supplied /opt/local/libexec/qt5/bin/moc
checking for the Qt version /opt/local/libexec/qt5/bin/moc uses... 5.12.4
checking for uic... using supplied /opt/local/libexec/qt5/bin/uic
checking for the Qt version /opt/local/libexec/qt5/bin/uic uses... 5.12.4
checking for rcc... using supplied /opt/local/libexec/qt5/bin/rcc
checking for the Qt version /opt/local/libexec/qt5/bin/rcc uses... 5.12.4
checking for qmake... using supplied /opt/local/libexec/qt5/bin/qmake
checking for the Qt version /opt/local/libexec/qt5/bin/qmake uses... 5.12.4
checking for Qt 5.3.0 or newer... yes
checking for lconvert... no
checking for libcmark... yes
checking for magic_open in -lmagic... yes
checking magic.h usability... yes
checking magic.h presence... yes
checking for magic.h... yes
checking for boostlib >= 1.49.0... yes
checking whether the Boost::System library is available... yes
configure: error: Could not find a version of the library!

I'm having trouble with upgrading other ports that also cite not being able to find a version of the boost library, e.g. source-highlight.

main.log is attached. Thank you for the support