builderImages configuration in func.yaml is documented here: https://github.com/knative/func/blob/main/docs/reference/func_yaml.md#builderimages

However, no matter the value placed in this configuration, the builderImages.pack is ignored by both the func build and func deploy commands.

Reproduction

1. Create any func project func create --language springboot myfunc
2. Change func.yaml to contain

builderImages:
  pack: paketobuildpacks/builder-jammy-full:latest

3. func build - notice it still uses ghcr.io/knative/builder-jammy-base:latest