how to install nginx_substitutions_filter in existing Nginx

[David Woodstuck]

I am a new Nginx user. I just install Nginx 1.12. I like to
use nginx_substitutions_filter. I cannot figure out how to install
nginx_substitutions_filter in previously existing Nginx.

I found this url -
http://www.newfreesoft.com/server/compiling_source_code_nginx_module_installation_subs_filter_1627/.
Should I unstall Nginx first?

Thanks,

David
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nginx.org/pipermail/nginx/attachments/20170606/389dd750/attachment.html>