With the friendly help of this page.
mkdir -p /opt/python
pkg install git python3 curl node16 yarn-node16
pkg install libxml2 libxslt pkgconf py39-xmlsec py39-cffi py39-ldap
git clone https://github.com/ngoduykhanh/PowerDNS-Admin.git /opt/powerdns-admin
cd /opt/powerdns-admin
python3 -m venv /web/python --system-site-packages
source /web/python/bin/activate
/web/python/bin/python3 -m pip install --upgrade pip wheel
# some ldap shit broken, so remove from requirements.txt
perl -pi -e 's,^python-ldap,\# python-ldap,' requirements.txt
pip install -r requirements.txt