Either apt is optional, or it is not?
b.
dpkg: regarding libc6_2.1.2-0pre7.deb containing libc6:
libc6 conflicts with apt (<< 0.3.0)
apt (version 0.1.9) is installed.
dpkg: error processing libc6_2.1.2-0pre7.deb (--install):
conflicting packages - not installing libc6
Package: apt
Status: install ok installed
Priority: optional