How to Choose dependencies using apt-get/aptitude

["Santanu Chatterjee" <thisissantanu@gmail.com>]

Hi Everybody,

I was trying to install mediawiki1.7 using aptitude. This
package has 'apache | httpd' as one of its dependencies.
I don't want to install apache. lighttpd seems to provide
httpd. So I installed that.

Now, when I tried to install mediawiki1.7, it still tries to
install apache although I already have httpd (lighttpd).
Could you tell me how do I prevent this from happening?

Regards,
Santanu