Either modify dox/dox.h and src/E.h so to include #include <freetype/freetype.h> (instead of the actual #include <freetype.h>)
or fix the configurator. I have it installed on my Lombard, and it works fine. Just remember to run the configurator with the option --enable-fsstd. I would gladly post the package but, although I have been running Debian for a while, I am still a slackware person... If you will kindly point me to right docs, I will be mantaining this and eventually other packages too. Cheers, Sergio