Mysteriously duplicated `!MESSAGE`s... about nmake-jumpstart HOT 2 CLOSED

traverse_src_tree:
    @cmd /v:on /c <<treewalk.cmd
    @echo off
    rem !!This below fails to run without the extra shell! :-o
    rem !!Also: if the env var is just called "make", the makefile gets parsed twice! :-oo
    set _make_=cmd /c $(MAKE_CMD)
    set srcroot_fullpath=!CD!\$(src_dir)
    :: echo $(src_dir)
    :: echo !srcroot_fullpath!
    rem Do the root level first (-> preps!)...
    rem (Note: naming a (different) target would avoid inf. recursion.)
    !_make_! /c start compiling
    rem Scan the source tree for sources...
    for /f %%i in ('dir /s /b /a:d !srcroot_fullpath!') do (
	    rem It's *vital* to use a local name here, not dir (==DIR!!!):
	    set _dir_=%%i
	    set _dir_=!_dir_:%srcroot_fullpath%=!
	    !_make_! /c compiling DIR=!_dir_!
    )
    !_make_! RECURSED_FOR_FINISHING=1 finish
<<

nmake /f Makefile RECURSING_FOR_COMPILING=1 /f Makefile out/obj/main.obj