sudo add-apt-repository ppa:pitti/postgresql
# ... OK
sudo apt-get install postgresql-8.4
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package postgresql-8.4 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'postgresql-8.4' has no installation candidate
Dois-je le télécharger à partir de http://packages.debian.org/squeeze/postgresql-8.4 et installer manuellement toutes les dépendances ?