This package conflicts with core/groff, obviously. If you don't use special features of groff yourself, you might like to replace it. Be sure to adjust the man system acordingly. You should include the following, replacing the relevant groff lines: TROFF /usr/bin/troff -mg -msafe -mpadj -mandoc | /usr/bin/dpost NROFF /usr/bin/nroff -Tlocale -mg -msafe -mpadj -mandoc EQN /usr/bin/eqn NEQN /usr/bin/neqn TBL /usr/bin/tbl COL /usr/bin/col -x This package also collides with core/coreutils, because of ptx(1). I don't know why the coreutils provide this program. I simply replaced it. This package isn't perfect, as it installs an executable file (vfontedpr) into /usr/share/doctools instead of /usr/lib/doctools. Similar but the other way round are the data files in /usr/lib/reftools/papers, which should be under /usr/share/ instead. Changing this would require quite a bit of effort, thus I ignore it. The situation now isn't all too bad.