Can't install webkit-gtk and gimp2 as xsane dependencies

[ftp83plus]

Hello to all, 

I am trying to install xsane to access a shared scanner. However, it fails when trying to install gimp2 and webkit-gtk as dependencies.

In the webkit-gtk log, the last lines show:
:info:build Traceback (most recent call last):
:info:build   File "./Tools/gtk/generate-inspector-gresource-manifest.py", line 18, in <module>
:info:build     import argparse
:info:build ImportError: No module named argparse
:info:build GNUmakefile:82484: recipe for target 'DerivedSources/WebInspectorUI/GResourceBundle.xml' failed
:info:build gmake: *** [DerivedSources/WebInspectorUI/GResourceBundle.xml] Error 1
:info:build gmake: *** Waiting for unfinished jobs....
:info:build gmake: Leaving directory '/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit-gtk/webkit-gtk/work/webkitgtk-2.4.9'
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit-gtk/webkit-gtk/work/webkitgtk-2.4.9" && /opt/local/bin/gmake -j4 -w all CC="/opt/local/bin/clang-mp-3.7 -arch x86_64" V=1 
:info:build Exit code: 2
:error:build org.macports.build for port webkit-gtk returned: command execution failed
:debug:build Error code: CHILDSTATUS 2795 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 webkit-gtk: org.macports.activate org.macports.build org.macports.destroot org.macports.install
:error:build Failed to install webkit-gtk
:debug:build Registry error: google-test not registered as installed & active.
:notice:build Please see the log file for port webkit-gtk for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit-gtk/webkit-gtk/main.log

So? Bug or misconfiguration?
And why would it try to add another Gimp version although I do have the Mac-native one installed?
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