If python lacks tk support, pysol will attempt to tell user to rebuild python with tcltk use flag. The tcltk use flag for python no longer exits and it instead called tk.
that's from the python_tkinter_exists function in the python eclass. Not specific to pysol.
Think that the line (/usr/portage/eclass/python.eclass:101) in the eclass should be: eerror "That means: 'dev-lang/python tk'" Python also does not have an X use flag.
This has been fixed at some point so closing this one...