OpenAPI Schema inserted into Package Definition (ytt -f package.yml --data-value-file openapiSchema=openapi.yml)

openapi.yml

type: object
properties:
  namespace:
    type: string
    default: fluent-bit

package.yml

#@ load("@ytt:data", "data")
#@ load("@ytt:yaml", "yaml")
---
apiVersion: data.packaging.carvel.dev/v1alpha1
kind: Package
metadata:
  name: fluent-bit.carvel.dev.1.5.3
  namespace: my-ns
spec:
  refName: fluent-bit.carvel.dev
  version: 1.5.3
  releaseNotes: "Fixed some bugs"
  capacityRequirementsDescription: "RAM: 10GB"
  licenses:
  - "Apache 2.0"
  - "MIT"
  releasedAt: 2021-05-05T18:57:06Z
  valuesSchema:
    openAPIv3: #@ yaml.decode(data.values.openapiSchema)
  template:
    spec:
      fetch:
      - imgpkgBundle:
          image: registry.tkg.vmware.run/tkg-fluent-bit@sha256:...