Virtual package ctags is provided by:
dpkg-query: no packages found matching universal-ctags Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend ||/ Name Version Architecture +++-===============-====================-==================================== ii exuberant-ctags 1:5.9~svn20110310-18 amd64 build tag file indexes of source code definitions 1 packages