problems installing libapreq-1.0

[Michael Robinton <mi...@bizsystems.com>]

I have two identical hosts with the following

mod_perl-1.26
apache apache_1.3.26
ben apachessl_1.48
openssll-0.9.6b

on one, libapreq-1.0 installs just fine, on the other I get this error:

In file included from
/usr/lib/perl5/site_perl/i386-linux/auto/Apache/include/include/httpd.h:79,
                 from apache_request.h:5,
                 from apache_request.c:59:
/usr/lib/perl5/site_perl/i386-linux/auto/Apache/include/include/buff.h:75:
openssl/ssl.h: No such file or directory
/usr/lib/perl5/site_perl/i386-linux/auto/Apache/include/include/buff.h:78:
#error "Don't use OpenSSL/SSLeay versions less than 0.9.2b, they have a
serious security problem!"
make[1]: *** [apache_request.o] Error 1

I can't figure out what the problem is. all the include files appear to be
in the same places on both machines. I've rebuilt everything from scratch
on the machine that fails :-(

Any ideas??

Michael