DIRS=\
    script      \
    unctrans    \
    guitrans    \
    sysmod      \

OLD_DIRS=\
    cookies  \
    printers \
    rasmig   \
    OsFiles  \
    v1       \
    netdrives\
    netshares\
    tmrel    \
    tmlrel   \
    tmrmvmed \
    lnkmig   \
    tmhomenet \

OPTIONAL_DIR_LIST=  \

;
; Trick to allow faster builds
;
ORIGINAL_DIRS=$(DIRS)
$(OPTIONAL)DIRS=$(OPTIONAL_DIR_LIST)
OPTIONAL_DIRS=$(1DIRS)
DIRS=$(ORIGINAL_DIRS) $(DIRS)