preferences:



Package: *
Pin: release o=Debian,a=stable
Pin-Priority: 900

Package: *
Pin: release a=sarge-backports
Pin-Priority: 200

Package: *
Pin: release o=Debian
Pin-Priority: -10



sources.list

deb http://http.us.debian.org/debian sarge main contrib non-free
deb http://security.debian.org/ sarge/updates main non-free contrib
deb http://www.backports.org/debian sarge-backports main contrib non-free


#  apt-get -t sarge-backports install mysql-server
Reading Package Lists... Done
Building Dependency Tree... Done
Some packages could not be installed. 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.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  mysql-server: Depends: mysql-server-5.0 but it is not going to be installed
E: Broken packages



# dpkg -l libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name               Version            Description
+++-==================-==================-====================================================
ii  libc6              2.3.2.ds1-22sarge4 GNU C Library: Shared libraries and Timezone data