Trouble with AWS plugin and Kubernetes with EKS

Greetings. I'm seeing a problem with the 1Password AWS shell plugin and EKS when using kubeconfig.

I have an ~/.aws/config files that looks something like this:

[profile nonprod]
aws_account_id = 99999999999
role_arn = arn:aws:iam::99999999999:role/Developer
region=us-east-1

The 1Password AWS plugin seems to be configured correctly according to op plugin inspect aws. I can also use this "nonprod" profile to make aws cli commands.

I am able to generate the Kubernetes configuration using the AWS CLI:

$ aws eks update-kubeconfig --name EKS-Non-Prod --profile nonprod
Updated context arn:aws:eks:us-east-1:99999999999:cluster/EKS-Non-Prod in /Users/mreardon/.kube/config

This creates a Kubernetes configuration that looks correct...

- name: arn:aws:eks:us-east-1:99999999999:cluster/EKS-Non-Prod
  user:
    exec:
      apiVersion: client.authentication.k8s.io/v1beta1
      args:
      - --region
      - us-east-1
      - eks
      - get-token
      - --cluster-name
      - EKS-Non-Prod
      - --output
      - json
      command: aws
      env:
      - name: AWS_PROFILE
        value: nonprod

In fact, if I make the configured get-token call manually, it works fine:

$ aws --region us-east-1 eks get-token --cluster-name EKS-Non-Prod --profile nonprod

However, when I try to use kubectl commands are run, I get the following error:

$ kubectl get pods -n dev

Partial credentials found in assume-role, missing: source_profile or credential_source
E0304 15:08:42.659372   17814 memcache.go:265] couldn't get current server API group list: Get "https://zzzzzzzzz.us-east-1.eks.amazonaws.com/api?timeout=32s": getting credentials: exec: executable aws failed with exit code 255
Unable to connect to the server: getting credentials: exec: executable aws failed with exit code 255

I'm guessing that the 1Password AWS plugin is not being used when the aws eks get-token command is run. Any ideas?

1Password Version: 1Password for Mac 8.10.28 (81028011)

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