Apologies in advance: I’ve been working with salt for the last few years . . .

I want to be able to use proxy_envs from group_vars/all to be able to set proxies in the environment for get_url tasks.
So my task will look like this:

- name: Download something via http          
  ansible.builtin.get_url:                            
    url: http://example.com/
  environment: "{{ proxy_env }}"

And I want to use yaml anchors, e.g.:

proxy_server: &proxy_server "http://squid:3128" 
proxy_env:
  http_proxy: *proxy_server
  https_proxy: *proxy_server
  ftp_proxy: *proxy_server

This seems to work fine. My problem is with no_proxy . . . I want it to be a list, e.g.

no_proxy: &no_proxy
  - url1
  - url2

But THEN I want to be able to set no_proxy with proxy_env like this:

no_proxy: &no_proxy
  - url1
  - url2
proxy_server: &proxy_server "http://squid:3128" 
proxy_env:
  http_proxy: *proxy_server
  https_proxy: *proxy_server
  ftp_proxy: *proxy_server
  no_proxy: "{{ *no_proxy|join(',') }}"

Ansible does not like this:

template error while templating string: unexpected '*'. String: {{ *no_proxy|join(',') }}. unexpected '*'"

Is this possible? Thanks!