`Makefile' is up to date.
make[1]: Entering directory `/home/ben/exim/exim-4.66/build-Linux-x86_64'
make[2]: Entering directory `/home/ben/exim/exim-4.66/build-Linux-x86_64/pcre'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/ben/exim/exim-4.66/build-Linux-x86_64/pcre'
gcc -DCOMPILE_UTILITY spool_in.c
In file included from exim.h:433,
from spool_in.c:14:
dbstuff.h:103:16: error: db.h: No such file or directory
In file included from exim.h:433,
from spool_in.c:14:
dbstuff.h:529: error: expected specifier-qualifier-list before DB
make[1]: *** [util-spool_in.o] Error 1
make[1]: Leaving directory `/home/ben/exim/exim-4.66/build-Linux-x86_64'
make: *** [go] Error 2