dpkg does not automatically complete installation after dependencies are met (page 157)
More...Reported on: 2005-09-02
In chapter 5. The Debian package management system on page 157:
In chapter 5.3.7, I state:
Since dpkg remembers the administrators request to install postfix, it will retry and automatically complete the installation as soon as the dependencies are fulfilled.
This is not correct. dpkg sets the desired state of the postfix package to "install", but it does not automatically configure it when netbase is installed.
Discussion
The shell interaction then shows the explicit configure request dpkg --configure postfix, which has the desired effect. Similarly, one could call dpkg --configure --pending, which would cause dpkg to retry the pending configuration of all unconfigured packages with a desired state of "install". Since netbase now exists on the system, the configuration of postfix would thus succeed.