panic: unknown NAT image for region: eu-central-1

[FaKleiser]

I have been following the deployment instructions in diego-release/examples/aws to deploy CF + Diego on AWS in eu-central-1.

When executing ./deploy_aws_environment create-stack deploy-bosh "$BOSH_DEPLOYMENT_DIR" "$DEPLOYMENT_DIR" "$STACK_NAME", the script calls boosh generate resulting in the following error:

+ boosh generate
++ extra_subnets
+ jq -c -S .
++ cat
++ '[' -f stubs/infrastructure/extra_subnets.yml ']'
panic: unknown NAT image for region: eu-central-1

goroutine 1 [running]:
panic(0x766780, 0xc420196440)
        /opt/golang/src/runtime/panic.go:500 +0x1a1
main.generate(0x953880, 0xc420026008)
        /opt/go/src/github.com/FaKeller/boosh/generate.go:35 +0x51a

Obviously the NAT AMI is not currently part of the NAT_AMIs known to boosh.
I have tried to add a NAT AMI to boosh, but to no avail. The deploy_aws_environment definitely uses my customized boosh, but still reports the NAT image as missing like above. Am I missing something?