Ingress-Nginx regex routing rule with named capture group in path

Question

I'm creating Kubernetes Ingress resources for an nginx Ingress Controller. The paths that I'll be using have an ID that I need to extract into a variable that may be in a different location in the path. E.g.:

http://myservice/environment/<someenv>/room/<roomid>
http://myservice/join/<roomid>

If I use a non-named capture group in the regex then the first path roomid will be $2 and for the second it'll be $1. Ideally I would be able to use a named capture group to assign it to a specific variable that I can easily use but creating an Ingress with the following path with a named capture group results in an error

# ingresses.networking.k8s.io "nginx-consistent" was not valid:
# * spec.rules[0].http.paths[0].path: Invalid value: "/join/(?<roomid>.*)": must be a valid regex

Is there a supported way to use named capture groups?

The current configuration doesn't have much interesting in it. The following is a trimmed down config.

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: {{.Release.Name}}-nginx-route-by-roomid
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/upstream-hash-by: "roomid-$roomid"
    nginx.ingress.kubernetes.io/use-regex: "true"
    nginx.ingress.kubernetes.io/configuration-snippet: |
      proxy_set_header ingress-handler nginx-route-by-roomid;
spec:
  rules:
    - http:
        paths:
          - backend:
              serviceName: {{ .Values.service.serviceName }}
              servicePort: {{ .Values.service.servicePort }}
            path: /api/v1/rooms/(?<roomid>[^/]*)
          - backend:
              serviceName: {{ .Values.service.serviceName }}
              servicePort: {{ .Values.service.servicePort }}
            path: /api/v1/players/([^/]*)/rooms/(?<roomid>[^/]*)