AWS IoT PubSubSdk Workshop: GDK tool fails in ca-central-1

I am running this workshop environment (C9, etc) in ca-central-1 but 'gdk component build' fails for this region.

An inclusive list is referenced in the error:

Error: 'ca-central-1' is not one of ['us-east-2', 'us-east-1', 'us-west-2', 'ap-south-1', 'ap-northeast-2', 'ap-southeast-1', 'ap-southeast-2', 'ap-northeast-1', 'cn-north-1', 'eu-central-1', 'eu-west-1', 'eu-west-2', 'us-gov-west-1', 'us-gov-east-1']. 

• Is there a simple fix, or is this bound into the GDK tool?

AWS Workshop: Build a Distributed IoT Application with the AWS IoT Greengrass PubSub SDK