Extending the timeout for Rails processes through Passenger on Nginx

I recently had to allow for a long running reporting task in a Rails app which is running under Passenger (mod_rails) on Nginx

The default setting is 60 seconds and setting send_timeout to 300 in the Nginx config wasn’t working.
After much searching, I found the answer. Edit /ext/nginx/Conguration.c and change the lines:

to (for a 5 min timeout)

You will then need to recompile nginx and restart it (sending the HUP signal won’t work in this case)

Hope this helps someone else out there.