postinst is in nethack-console 3.6.0-4.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #!/bin/sh
set -e
update-alternatives --install /usr/games/nethack nethack \
/usr/lib/games/nethack/nethack-console.sh 50
|