[gentoo-user] recently masked

Today's update world produced

    !!! The following installed packages are masked:
    - dev-python/python-exec-10000.1::gentoo (masked by: package.mask)
    /var/portage/profiles/package.mask:
    # Michał Górny <mgorny@g.o> (06 Mar 2014)
    # Compatibility packages masked for removal in 30 days.

OK, but I can't depclean it

    allan ~ # emerge --depclean =dev-python/python-exec-10000.1

    Calculating dependencies... done!
      dev-python/python-exec-10000.1 pulled in by:
        dev-python/pycups-1.9.63 requires dev-python/python-exec:0/0=[python_targets_python2_7(-),-python_single_target_python2_6(-),-python_single_target_python2_7(-),-python_single_target_pypy2_0(-)]
        dev-python/reportlab-2.6 requires dev-python/python-exec:0/0=[python_targets_python2_7(-),-python_single_target_python2_6(-),-python_single_target_python2_7(-)]
        media-libs/mesa-9.1.6 requires dev-python/python-exec:0/0=[python_targets_python2_7(-),python_single_target_python2_7(+)]
        x11-libs/xpyb-1.3.1-r2 requires dev-python/python-exec:0/0=[python_targets_python2_7(-),-python_single_target_python2_6(-),-python_single_target_python2_7(-)]

and trying

    emerge --depclean =dev-python/python-exec-10000.1 reportlab mesa xpyb pycups

shows more dependencies.

Have I simply sync'ed an inconsistent version of portage and should
"ignore and try again tomorrow"?

thanks,
allan