How to include conf files inside custom nginx conf file in Elastic Beanstalk platform?

Anyone knows how can I use "include default.d/php.conf" inside a server match block in .platform/conf.d/server.conf, because when I change it directly from the instance it works fine, but when I deploy the app, it's like it's having problem with the paths of the file.

server {
    listen 80;
    listen [::]:80;
    server_name api.servername.com;
    root       /var/www/html/api/;
   
  ...other rules....
  
  # Rewrite urls without .php
    location / {
        rewrite ^/(.*)$ /$1.php last;
        include default.d/php.conf;
    }
}

I'm getting this error: open() "/var/proxy/staging/nginx/default.d/php.conf" failed (2: No such file or directory) in /var/proxy/staging/nginx/conf.d/servers.conf:58

It's like its using /var/proxy/staging instead /etc/nginx/

Thanks!