helmfile: release templating cannot refer to other release variables

I’m using release templating for a common directory structure with auto loading values per environment, and really want to use in installed field as well. But for the life of me, I can’t figure out how. Either there’s a bug or I’m doing something wrong (most probably)

I have this in templates.yaml:

  loader: &loader
    missingFileHandler: Debug
    values:
    - values.yaml
    - values.yaml.gotmpl
    - ./{{ if contains "prod" .Environment.Name }}prod.yaml{{ else }}nonexistent.yaml{{end}}
    - ./{{ if contains "prod" .Environment.Name }}prod.yaml.gotmpl{{ else }}nonexistent.yaml{{end}}
    - ./{{ .Environment.Name }}.yaml
    - ./{{ .Environment.Name }}.yaml.gotmpl

and I’m trying to do something like this:

---
bases:
- ../../common/environments.yaml
- ../../common/defaults.yaml
---
{{ readFile "../../common/templates.yaml" }}
releases:
- name: "prometheus-operator"
  namespace: "prometheus-operator"
  chart: "stable/prometheus-operator"
  installed: {{ .Values.releases.`{{ .Release.name }}` | getOrNil "enabled" | default "false" }}
  <<: *loader

ideally, I want version and installed to go live in the loader template, but I can’t - no combination of {s and `s work. and yes, I’ve tried installedTemplate as well. I have to hardcode it for now like this

  version:   {{ .Values.releases.prometheus_operator | getOrNil "version" | default "~8" }}
  installed: {{ .Values.releases.prometheus_operator | getOrNil "enabled" | default "false" }}

@mumoshu any chance you could have a look?