--- win32/gc/compile.cmd	2019/12/03 16:34:58	1.9
+++ win32/gc/compile.cmd	2019/12/09 11:37:41	1.10
@@ -3,5 +3,6 @@ call "%VS71COMNTOOLS%\vsvars32.bat"
 REM !!! patch GC_abort in misc.c using misc.diff !!!
 REM !!! patch NT_MAKEFILE using NT_MAKEFILE.diff !!!
 
+nmake -f NT_MAKEFILE clean
 nmake -f NT_MAKEFILE cpu=i386 make_as_lib=1
 REM nmake -f NT_MAKEFILE cpu=i386 make_as_lib=1 nodebug=1