I'm trying to install phusion passenger nginx module, but it fails:

passenger-install-nginx-module

error:

* Curl development headers with SSL support... not found

The installer is hiding useful error messages. I was getting the same error on CentOS 5.3 with curl and curl-devel 7.15.5 installed. I solved this problem by installing:

yum install zlib-devel e2fsprogs-devel krb5-devel