Can't compile on Debian Sid

I can't get jamin to compile on my AMD64 Debian Sid system.
The problem is that pkg-config complains about missing
.pc files in the X development libraries. I'm pretty sure I
have the correct dev packages installed, but they don't contain
the expected .pc files.

Is there an easy way to bypass the need for pkg-config?
I can cope with gcc stopping due to missing headers, but I'm
unfamiliar with the inner workings of the auto configuration tools
and haven't got time to learn - I have a mixed down CD I need to
master for a client in a hurry. (BTW I can't use the Debian jamin
package because I had to patch JACK to make it work with my hardware).

If anyone can suggest a quick workaround I'd appreciate it.

John