Something

#!/bin/sh
# prerm script for nginx
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <prerm> `remove'
#        * <old-prerm> `upgrade' <new-version>
#        * <new-prerm> `failed-upgrade' <old-version>
#        * <conflictor's-prerm> `remove' `in-favour' <package> <new-version>
#        * <deconfigured's-prerm> `deconfigure' `in-favour'
#          <package-being-installed> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
    remove|remove-in-favour|deconfigure|deconfigure-in-favour)
        invoke-rc.d nginx stop
        ;;
    upgrade|failed-upgrade)
        ;;
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

# Automatically added by dh_installinit
if [ -x "/etc/init.d/nginx" ]; then
        if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
                invoke-rc.d nginx stop || exit $?
        else
                /etc/init.d/nginx stop || exit $?
        fi
fi
# End automatically added section


exit 0