resources.elasticIPs.<name> not creating elastic IP

[BLucky-gh]

I can create an s3 bucket and an IAM role and bind that role to an ec2 server via resources.<type>.<name>, but when I set resources.elasticIPs.<name> it doesn't get created (nixops info -d <name> doesn't show the elastic ip in the list) and resources.elasticIPs.<name>.address stays at _UNKNOWN_ELASTIC_IP_.

also when I try to set deployment.ec2.elasticIPv4 to resources.elasticIPs.<name> I get the error that resources.elasticIPs.<name> is not of type elastic-ip

additional info:
nixops --version = NixOps 2.0.0-pre-fc9b55c
the network configuration is supplied via flake