qt6-qtbase fails to install

[pdvnl]

for mkvtoolnix this is a dependence

--->  Computing dependencies for qt6-qtbase
--->  Fetching archive for qt6-qtbase
--->  Attempting to fetch qt6-qtbase-6.4.3_6+openssl.darwin_19.x86_64.tbz2 from https://packages.macports.org/qt6-qtbase
--->  Attempting to fetch qt6-qtbase-6.4.3_6+openssl.darwin_19.x86_64.tbz2 from https://mse.uk.packages.macports.org/qt6-qtbase
--->  Attempting to fetch qt6-qtbase-6.4.3_6+openssl.darwin_19.x86_64.tbz2 from https://nue.de.packages.macports.org/qt6-qtbase
--->  Building qt6-qtbase
Error: Failed to build qt6-qtbase: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_aqua_qt6/qt6-qtbase/main.log for details.
Error: Problem while installing qt6-qtbase
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.

[pdvnl]

last part of log (total size 124MB)

[ryandesign (Ryan Carsten Schmidt)]

The portion of the log you attached doesn't contain the error message. Please attach the entire log, compressing it first.

[pdvnl]

no response in 4 weeks.

instead of 'port upgrade outdated' -> mkvtoolnix, today i used 'port -dv install qt6-qtbase'. log attached.