Packer with AWS SSO Profile

I’m trying to use packer with the “profile” variable (without needing to supply static access keys) which I am configuring using the aws configure sso command - but when trying to run the packer command I get the error:

Error: NoCredentialProviders: no valid providers in chain. Deprecated.
For verbose messaging see aws.Config.CredentialsChainVerboseErrors

in my packer variables.json I have "aws_profile": "sandbox" and in my environment.json I have

"builders": [
            "type": "amazon-ebs",
            "profile": "{{user `aws_profile`}}"

Am I missing something or is it not possible to do this?

Im interested in this issue too. Update from the HC would be welcomed…