Source: postgresql-contrib-9.1 Version: 9.1.2-1 Severity: normal pg_upgrade (which, btw., is not mentioned in the package description) needs pg_config to run, so in order to use that one needs to install postgresql-server-dev-9.1. At least this should be put into Suggests: and added to the package description. A better solution might be to add a copy of pg_config to this package, so one doesn't have to install the whole -dev stack on a database machine where one wants to run pg_upgrade.
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