[Exim] mandrake help!

I just installed Mandrake 8.2 on a machine of mine. I wanted to use Exim, so
I downloaded the Exim 3.35 source. Create the Local/Makefile, run make. It
links everything up, then starts compiling. But when it gets to
exim_dbmbuild I get this:

gcc -O  -o exim_dbmbuild  exim_dbmbuild.c \
  -lnsl -lcrypt  -ldb
In file included from exim.h:332,
                 from exim_dbmbuild.c:30:
dbfn.h:107:16: db.h: No such file or directory
make[1]: *** [exim_dbmbuild] Error 1

What do I do? Am I missing a particular development package? If so, please
tell me what and I will install it.

Thanks!