preinst is in lynx-cur-wrapper 2.8.8pre4-1.
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 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #!/bin/sh
set -e
case "$1" in
    install|upgrade)
    if dpkg --compare-versions "$2" 'lt-nl' '2.8.8dev.8-2' ; then
	update-alternatives --remove lynx /usr/bin/lynx-cur
	update-alternatives --remove www-browser /usr/bin/lynx-cur
    fi
    ;;
    abort-upgrade)
    ;;
    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
 |