When invoking clearmake, why symbol definition doesn't work on the command line?

I type the following on command prompt:

H:\clearmake -f makefile.mk "CCD_FLAGS += -dMACHINE1"

It looks like the source file that has MACHINE1 compile time flag around it is not getting
built. When I look at the map file, I only see .debug section for this file. And the size
of this .debug section is too small, only 68 bytes. I should also see const, data, and text
sections for this source file in the map file.

Also, when the source file is getting compiled, I see definition of other -d symbols on the screen,
but definition of MACHINE1 symbol doesn't appear on the screen.

Please advise.

Thank you!