graphviz @2.40.1_3+pangocairo+x11: error: unknown type name 'uuid_string_t'

[kneutron]

Env: 2011 iMac, core i5, 20GB RAM, running High Sierra 10.13.6 from Samsung T5 external USB3 drive

On port update; port upgrade outdated I have been seeing this build error for about a month?

--->  Computing dependencies for graphviz
--->  Fetching archive for graphviz
--->  Attempting to fetch graphviz-2.40.1_3+pangocairo+x11.darwin_17.x86_64.tbz2 from https://packages.macports.org/graphviz
--->  Attempting to fetch graphviz-2.40.1_3+pangocairo+x11.darwin_17.x86_64.tbz2 from https://ywg.ca.packages.macports.org/mirror/macports/packages/graphviz/graphviz
--->  Attempting to fetch graphviz-2.40.1_3+pangocairo+x11.darwin_17.x86_64.tbz2 from https://mse.uk.packages.macports.org/graphviz
--->  Building graphviz
Error: Failed to build graphviz: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_graphviz/graphviz/main.log for details.

(from above log)

:info:build In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.fr
amework/Headers/HFSVolumes.h:25:
:info:build /usr/include/hfs/hfs_format.h:794:2: error: unknown type name 'uuid_string_t'; did you mean 'io_string_t'?
:info:build         uuid_string_t   ext_jnl_uuid;
:info:build         ^
:info:build /usr/include/device/device_types.h:89:16: note: 'io_string_t' declared here
:info:build typedef char                    io_string_t[512];
:info:build                                 ^
:info:build :
:info:build In file included from ./gvplugin_quartz.h:22:

Additional error:

:info:build In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/HFSVolumes.h:25:
:info:build /usr/include/hfs/hfs_format.h:794:2: error: unknown type name 'uuid_string_t'; did you mean 'io_string_t'?
:info:build         uuid_string_t   ext_jnl_uuid;
:info:build         ^
:info:build /usr/include/device/device_types.h:89In file included from gvplugin_quartz.c:18:
:info:build In file included from ./gvplugin_quartz.h:22:

Additional:

:info:build In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/HFSVolumes.h:25:
:info:build /usr/include/hfs/hfs_format.h:794:2: error: unknown type name 'uuid_string_t'; did you mean 'io_string_t'?
:info:build         uuid_string_t   ext_jnl_uuid;
:info:build         ^
:info:build /usr/include/device/device_types.h:89:16: note: 'io_string_t' declared here
:info:build typedef char                    io_string_t[512];       
:info:build                                 ^
:info:build :16: note: 'io_string_t' declared here
:info:build typedef char                    io_string_t[512];       
:info:build                                 ^
:info:build In file included from gvdevice_quartz.c:18:

Additional:

:info:build In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/HFSVolumes.h:25:
:info:build /usr/include/hfs/hfs_format.h:796:20: error: use of undeclared identifier 'uuid_string_t'
:info:build         char            reserved[JIB_RESERVED_SIZE];
:info:build                                  ^
:info:build /usr/include/hfs/hfs_format.h:787:61: note: expanded from macro 'JIB_RESERVED_SIZE'
:info:build In file included from gvrender_quartz.c:32:

This is preventing ' port upgrade ' from completing properly

See attached logfile

[kneutron]

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_graphviz/graphviz/main.log gzipped