preinst is in libghc-gstreamer-dev 0.12.1-1.
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 7 8 9 10 11 12 | #!/bin/sh
set -e
if [ "$1" = "upgrade" ]
then
ghc-pkg unregister --force gstreamer-`echo $2 | sed 's/-.*//'` \
> /dev/null 2>&1 \
|| true
fi
|