Update digikam 3.5.0 to 4.-- produces error:: command execution failed while executing "system -nice 0 $fullcmdstring"

[lllactive@…]

sudo port upgrade outdated

---> Computing dependencies for digikam
---> Building digikam
Error: org.macports.build for port digikam returned: command execution failed
Please see the log file for port digikam for details:

/opt/local/var/macports
/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/main.log

Error: Unable to upgrade port: 1
To report a bug, follow the instructions in the guide:

​http://guide.macports.org/#project.tickets[[BR]]

tail -n30 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/main.log
:info:build /opt/local/bin/cmake -E cmake_progress_report /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/work/build/CMakeFiles 23 24 25 26 27 28 29 30 31 32 33
:info:build [100%] Built target digikam
:info:build 1 warning and 1 error generated.
:info:build make[2]: * [core/digikam/CMakeFiles/digikamnepomukservice.dir//utilities/nepomuk/digikamnepomukservice.cpp.o] Error 1
:info:build make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/work/build'
:info:build make[1]: * [core/digikam/CMakeFiles/digikamnepomukservice.dir/all] Error 2 :info:build make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/work/build'
:info:build make: * [all] Error 2 :info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/work/build'
:info:build Command failed: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/work/build" && /usr/bin/make -j8 -w all
:info:build Exit code: 2 :error:build org.macports.build for port digikam returned: command execution failed :debug:build Error code: CHILDSTATUS 86738 2 :debug:build Backtrace: command execution failed

while executing

"system -nice 0 $fullcmdstring"

("eval" body line 1) invoked from within

"eval system $notty $nice \$fullcmdstring"

invoked from within

"command_exec build"

(procedure "portbuild::build_main" line 8) invoked from within

"portbuild::build_main org.macports.build"

("eval" body line 1) invoked from within

"eval $procedure $targetname" :info:build Warning: targets not executed for digikam: org.macports.install org.macports.build org.macports.destroot :notice:build Please see the log file for port digikam for details:

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_kde_digikam/digikam/main.log