Create a one-off builder:

nsc create --bare --output=json | jq -r .cluster_id | xargs echo nsc ssh

On the remote machine, run:

sed -i 's/^#http:/http:/g' /etc/apk/repositories

apk update
apk upgrade
apk add jq make docker crane git

mkdir -p /etc/docker
echo '{"features": {"containerd-snapshotter": true}}' > /etc/docker/daemon.json

rc-update add docker
rc-service docker start

#cp /etc/docker/daemon.json /etc/docker/daemon.bkp.json
#jq '.features = {"containerd-snapshotter": true}' /etc/docker/daemon.bkp.json \
#  > /etc/docker/daemon.json

git clone https://github.com/siderolabs/pkgs
cd pkgs

docker buildx create --name local --use