pango +tests fails to build due to a wrong python call: env: python3: No such file or directory

[barracuda156]

--->  Building pango
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/build" && /opt/local/bin/ninja -j6 -v 
[1/170] /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango test-coverage tests
FAILED: tests/test-coverage.test 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango test-coverage tests
env: python3: No such file or directory
[2/170] /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango testboundaries tests
FAILED: tests/testboundaries.test 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango testboundaries tests
env: python3: No such file or directory
[3/170] /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango testboundaries_ucd tests
FAILED: tests/testboundaries_ucd.test 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango testboundaries_ucd tests
env: python3: No such file or directory
[4/170] /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango testcolor tests
FAILED: tests/testcolor.test 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-installed-test.py /opt/local/libexec/installed-tests/pango testcolor tests
env: python3: No such file or directory
[5/170] /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-all-unicode.py tests/all-unicode.txt
FAILED: tests/all-unicode.txt 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_x11_pango/pango/work/pango-1.52.2/tests/gen-all-unicode.py tests/all-unicode.txt
env: python3: No such file or directory