remove kgamma gnome cron libksieve0 libsm-dev Building the package cache... Initializing package resolver and worker... E: invalid version string '0.78_02-1' W: error while parsing a version for the package 'perl-modules' Scheduling requested actions... Resolving possible unmet dependencies... W: version string 'M17-1': first upstream character 'M' is not a digit W: version string 'M17-1': first upstream character 'M' is not a digit W: some solutions were dropped, you may want to increase the value of the 'cupt::resolver::max-solution-count' option E: unable to resolve dependencies, because of: xlibs-dev 4.3.0.dfsg.1-14sarge7 depends on 'libsm-dev' -> no solutions tk8.4-dev 8.4.9-1sarge2 depends on 'libxt-dev | xlibs-dev' -> installed xlibs-dev 4.3.0.dfsg.1-14sarge7 libxt-dev 4.3.0.dfsg.1-14sarge7 depends on 'libsm-dev' -> removed libxt-dev E: error performing the command 'remove'