<red><b>Unable to download or extract Nginx source tarball</b></red>

Possible reasons:

 <b>* Your Internet connection is unstable.</b>
   If this is the case, try re-running this installer with higher connection
   timeouts:

     passenger-config compile-nginx-engine --connect-timeout 60 --idle-timeout 60

 <b>* You are not connected to the Internet.</b>
   If this is the case, then please connect to the Internet and try again.

 <b>* The URL that this installer tried to download from no longer exists.</b>
   Please file a bug report if this is the case:
   https://github.com/phusion/passenger/issues

 <b>* The download was corrupted.</b>
   Please try to re-run this installer:

     passenger-config compile-nginx-engine

 <b>* Phusion Passenger Standalone is not able to write to /tmp.</b>
   Please fix the permissions for this directory, or run this installer with
   root privileges:

     <%= PlatformInfo.ruby_sudo_command %> passenger-config compile-nginx-engine