Nginx redirect to Conifer page issue: invalid variable name "$", i.e., $br:<preconfigured browser>:<version>.

[oh-kii]

I am trying to establish vanity redirects to land on Conifer pages via nginx, but it seems that having the $ in the destination url causes an invalid variable name "$" in nginx. This is due to variable interpolation. I thought to work around this by replacing the $ with the encoded %24, but it does not seem that Confier currently supports this.

There is a workaround for this which is what I would like to implement as a last resort: nginx escaping dollar.

After some reading of the user guide, and trial and error, I thought to then try to navigate to a confier page without the $br:<preconfigured browser>:<version> in the url; however, it appears that in order to render Flash archived pages, the $br:chrome:76 param is needed in order to determine Flash support for the remote browser.

# nginx entry
location = /aitken {
  return 301  <substitute 1,2,3 examples below>;
  break;
}

# 1. "As is" - nginx error, invalid variable name "$"
https://conifer.rhizome.org/nyarc/moma-doug-aitken/20201214151519$br:chrome:76/https://www.moma.org/interactives/exhibitions/2007/aitken/

# 2. Replace $ with %24 - navigates to Conifer, but captuerd page fails to load
https://conifer.rhizome.org/nyarc/moma-doug-aitken/20201214151519%24:chrome:76/https://www.moma.org/interactives/exhibitions/2007/aitken/

# 3. Without $br:browser:version - navigates to Conifer, but Flash does not render
https://conifer.rhizome.org/nyarc/moma-doug-aitken/20201214151519/https://www.moma.org/interactives/exhibitions/2007/aitken/

Please advice is there is another approach!

Otherwise, may I request an enhancement for the processing of Conifer urls that encode $ as%24?

Thank you!