Bug#583314: mktemp essential?

Hmm, OK. I am not familiar with what that means. How is "essentialness" enforced? Should the installer know this and automatically install essential packages when upgrading then? Perhaps this is a reflection of a bug from another part of the system since mktemp did not get automatically in

Bug#583314: ca-certificates: Does not install without mktemp but mktemp is not a dependency.

Package: ca-certificates Version: 20080809 Severity: serious Justification: Policy 3.5 -- System Information: Debian Release: 5.0.4 Architecture: i386 (i686) Kernel: Linux 2.6.32-trunk-vserver-686 (SMP w/1 CPU core) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /b