you can set it in the general configuration of the server ...
http {
....
scgi_temp_path temp/scgi_temp;
uwsgi_temp_path temp/uwsgi_temp;
}
tested on windows and works ...
didn't test on any other platform
Vladan
Posted at Nginx Forum: http://forum.nginx.org/read.php?2,103927,105794#msg-105794