Muflone, cmarked is the only remaining mandatory reverse dependency of python-pyside.
Qt4 is EOL since 2015, and pyside was a minor, lesser used Python binding for it. I understand your cautious approach, but very old legacy unused packages that are broken are not particularly worthy targets to keep in my view. Not even Debian maintains PySide for Qt4 in any of its repos. The way I am submitting cascading deletion requests are carefully considered. Deleting cmarked would allow deleting the nowhere else needed python-pyside and (python-)shiboken.
