Package: g++ Severity: important apt-get install g++=4:3.3.5-3 yields: The following packages have unmet dependencies: g++: Depends: g++-3.3 (>= 1:3.3.5-1) but it is not going to be installed Same thing for apt-get install g++ -- System Information: Debian Release: 3.1 Architecture: i386 (i686) Kernel: Linux 2.6.8-2-386 Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)