I want to use $ in module argument

[Anatoli Marinov]

Hello,
I am working on custom module which uses pcre. It could be configured and
one from the arguments is a regular expression. How can I use argument with
$ sign into it. Every time when I try for example use it like "
my_custom_module '\.mp4$' " I got the error:

invalid variable name in nginx.conf:62

In line 62 I have my module configuration.
I tried to escape $ with \$ and also tried $$ but they both don't work.
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