PKGBUILDs/community/couchdb/couchdb.install

post_upgrade() {
    if [ $(vercmp $2 2.0.0-15) -lt 0 ] ; then
        cat << EOF

Since 2.0.0-15, couchdb user now defaults to couchdb group (it used to be in the daemon group).
You might want to change couchdb user to this new group and fix ownership of its files.

EOF
    fi
}