postgresql-8.2をインストール /etc/apt/preferencesを修正 Package: * Pin: release a=etch-backports Pin-Priority: 1 Package: * Pin: release a=stable Pin-Priority: 900 Package: postgresql-8.2 Pin: release a=etch-backports Pin-Priority: 900 Package: libpq-dev Pin: release a=etch-backports Pin-Priority: 900 Package: postgresql-server-dev-8.2 Pin: release a=etch-backports Pin-Priority: 900 /etc/apt/sources.listに追加