Issues building crux ISO

I am getting errors building crux iso.

git clone https:/github.com/vyos/vyos-build --branch crux vyos-crux
cd vyos-crux
docker build -t vyos-builder:crux docker
docker run --rm -it --privileged -v $(pwd):/vyos -w /vyos vyos-builder:crux bash
make iso

and I get this:

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
vyos-world : Depends: vyatta-op but it is not going to be installed
Depends: vyatta-config-mgmt but it is not going to be installed
Depends: vyatta-op-firewall but it is not going to be installed
Depends: vyatta-cfg-op-pppoe but it is not going to be installed
Depends: vyatta-op-qos but it is not going to be installed
Depends: vyatta-cfg-quagga but it is not going to be installed
Depends: vyatta-op-quagga but it is not going to be installed
Depends: vyatta-op-vpn but it is not going to be installed
Depends: vyatta-cluster but it is not going to be installed
Depends: vyatta-conntrack but it is not going to be installed
Depends: vyatta-nat but it is not going to be installed
Depends: vyatta-netflow but it is not going to be installed
Depends: vyatta-openvpn but it is not going to be installed
Depends: vyatta-ravpn but it is not going to be installed
Depends: vyatta-wanloadbalance but it is not going to be installed
Depends: vyatta-webproxy but it is not going to be installed
Depends: vyatta-wireless but it is not going to be installed
Depends: vyatta-wirelessmodem but it is not going to be installed
Depends: vyos-nhrp but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
P: Begin unmounting filesystems…
P: Saving caches…
Reading package lists…
Building dependency tree…
Reading state information…

Currently the transition from Debian Jessie to Debian Buster is ongoing. Things can be a bit rough right now - sorry for the inconvenience.

This does not make sense to me. Crux is supposed to be a stable release. In my occurring this should mean that pulling the Crux files from git should work 99.999% of the time. Am I missing something?

What is the proper command to pull a working stable version of the source code for VyOS from github?

I did a clean pull of crux. Found the instructions in the Docs…although it took a bit of digging. Docker image built without issue. Iso built without issue. Thanks.