# aptitude dist-upgrade Reading Package Lists... Done Building Dependency Tree Reading extended state information Initializing package states... Done Reading task descriptions... Done Some packages had unmet dependencies. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following packages have unmet dependencies: xlibmesa-glu: Depends: xfree86-common but it is not installable Conflicts: libglu1 which is a virtual package. libglu1-mesa: Conflicts: libglu1 which is a virtual package. libfam0: Conflicts: libfam0c102 (< 2.7.0-10) but 2.7.0-6sarge1 is installed and it is kept back. libfam0c102: Conflicts: libfam0 but 2.7.0-10 is to be installed.