Makeit stops when it encounters an error (a truly frustrating event if you left the build to run over night).
You can improve the process by using -i to ignore errors and by logging the messages to a file. First, remake all of the .Make files to be slow (use the includes target because it will run fast):
Makeit -M includes
csh, use:
Makeit -i >& makeit.log
ksh and sh, use:
Makeit -i >makeit.log 2>&1