gh - Fails to Build - Symbol not found: _notify_is_valid_token

[RobK88]

The port gh fails to build don Mtn Lion - Symbol not found: _notify_is_valid_token

sudo port -v install gh
--->  Computing dependencies for gh.
--->  Fetching archive for gh

...

xinstall: mkdir /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gh/gh/work/destroot/opt/local/share/bash-completion
xinstall: mkdir /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gh/gh/work/destroot/opt/local/share/bash-completion/completions
Error: Failed to destroot gh: dyld: Symbol not found: _notify_is_valid_token
  Referenced from: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gh/gh/work/destroot/opt/local/bin/gh
  Expected in: /opt/local/lib/libMacportsLegacySystem.B.dylib
 in /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gh/gh/work/destroot/opt/local/bin/gh
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gh/gh/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: Processing of port gh failed