Plus builds (e.g., for 6uN) are done by:
1. cloning base repos (via master).
2. extracting "OUTPUTDIRs" from FCS builds into the build directory.
3. calling the 'plus' targets in the control Makefiles.

Sometimes files that are needing to be updated are not because they are part of the "OUTPUTDIRs" archive.

Because some binaries that are to be destined for plus build bundles are defined as Makefile targets, they are not updated because they already exist in the build area.

Concrete example: YTB CCT:
YAHOOCCT = $(TEMPDIR)/yahoocct.exe

$(YAHOOCCT):
$(CP) $(CURRENTDIR)/yahoo/yahoocct.exe $(TEMPDIR)/