DMD win32.mak error

[Paul D Anderson via Digitalmars-d-learn]

While building DMD -- "make -fwin32.mak release" -- I received 
the following error message:

echo "2.073.2" > verstr.h
Error: don't know how to make '../res/default_ddoc_theme/ddoc'
--- error level 1

I'm guessing it might be a build configuration problem on my end, 
but what is the problem?

Paul