As an example of how this causes charms to fail, the PostgreSQL charm installs the language-pack-en package. If the apt cache has not recently been updated, it may well be referencing an old version that has since been removed from the archive and the install hook fails.
As an example of how this causes charms to fail, the PostgreSQL charm installs the language-pack-en package. If the apt cache has not recently been updated, it may well be referencing an old version that has since been removed from the archive and the install hook fails.