Hello Philippe, On Tue, 2011-05-31 at 16:27 +0200, Philippe Naudin wrote: > Here is what I have tried : > Provides: tetex = %{version} > Obsoletes: tetex < %{version} > > But it doesn't help, yum is ready to install texlive but doesn't > remove tetex. Not sure if the Obsoletes tag actually works as intended or expected, but these version tests are odd. Unless tetex and texlive use the same version numbers you are testing the wrong version number, and also why the '<'? Try this without the version test, just Provides: tetex Obsoletes: tetex Regards, Leonard. -- mount -t life -o ro /dev/dna /genetic/research