I am trying to install a Beryl Theme.  Upon running ./configure, the process ends with the error
error: Can\'t find X includes. Please check your installation and add the correct paths!Any idea what is wrong?

OK, that helped.  I got past that and got another error message:

[INDENT]checking for Qt... configure: error: Qt (>= Qt 3.3 and < 4.0) (library qt-mt) not found. Please check your installation!
For more details about this problem, look at the end of config.log.
Make sure that you have compiled Qt with thread support!

[/INDENT]So of course I went to my Synaptic Package Manager (Mepis) and installed libqt3-mt-dev and now I run into this:

[INDENT]checking for KDE... configure: error:
in the prefix, you\'ve chosen, are no KDE headers installed. This will fail.
So, check this please and use another prefix!
[/INDENT]