post_upgrade() {
    if (( $(vercmp '2.0.0-1' "$2") == 1 )); then
        cat >&2 <<-EOF
As of 2.0.0, aurutils no longer supports repose. If you have repose installed,
please rebuild your local repository using repo-add. See:

https://bbs.archlinux.org/viewtopic.php?pid=1707649#p1707649

for detailed instructions. For the 2.0.0 changelog, see:

https://github.com/AladW/aurutils/releases/tag/2.0.0
EOF
    fi
}