MAAS installation appears to fail because of a missing component dbc_go

[Mark Shuttleworth]

Working with maas-test I observed:

cmd #0008: {{{ssh -i /var/cache/maas-test/vm_ssh_id_rsa -o LogLevel=quiet -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ubuntu@192.168.122.61 LC_ALL=en_US.UTF-8 sudo http_proxy=http://192.168.122.1:42676 https_proxy=http://192.168.
122.1:42676 DEBIAN_FRONTEND=noninteractive apt-get install -y maas maas-dhcp maas-dns}}}
cmd #0008 retcode: {{{0}}}
cmd #0008 stderr: {{{
Extracting templates from packages: 15%^MExtracting templates from packages: 30%^MExtracting templates from packages: 46%^MExtracting templates from packages: 61%^MExtracting templates from packages: 76%^MExtracting templates from packages: 92%
^MExtracting templates from packages: 100%
/tmp/maas-region-controller.config.29343: 35: /tmp/maas-region-controller.config.29343: dbc_go: not found
maas-region-controller failed to preconfigure, with exit status 127

What is dbc_go in this context? Is this a failure that might interfere with the reliability of maas-test?