Is it just me, or is the greenplum ppa broken?

[Brad Howerter]

I've installed the ppa, but I get this error:
Unable to locate package greenplum-db-6

More details:

# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.6 LTS
Release: 18.04
Codename: bionic

# uname -m
aarch64

root@e80c8a8d2303:/etc/apt/sources.list.d# cat greenplum-ubuntu-db-bionic.list
deb http://ppa.launchpad.net/greenplum/db/ubuntu bionic main
# deb-src http://ppa.launchpad.net/greenplum/db/ubuntu bionic main
root@e80c8a8d2303:/etc/apt/sources.list.d# apt install greenplum-db-6
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package greenplum-db-6

[Brad Howerter]

It does seem to be just me, and just on my Mac docker container. Something to do with network access, I guess.  It works in my proxmox server.