dpkg --purge libxt6
dpkg: dependency problems prevent removal of libxt6:
 gs-gpl depends on libxt6 | xlibs (>> 4.1.0); however:
  Package libxt6 is to be removed.
  Package xlibs is not installed.
dpkg: error processing libxt6 (--purge):
 dependency problems - not removing
Errors were encountered while processing:
 libxt6