post_install() {
    echo '=> calibre and calibre-python3 are now co-installable'
    echo '=> use `calibre-alternatives set [2|3]` to switch between them'
}

post_remove() {
    if [ -e /usr/lib/calibre/bin ]; then
        rm /usr/lib/calibre/bin
        rmdir /usr/lib/calibre/
    fi
}
