From: tobitosso
I want to build. revision 18766 of ReactOS I typed in
mingw32-make bootcd in my MSYS window
That's the problem probably. When you use MSYS, "make" will use its shell
program to execute subcommands. The shell doesn't understand backslashes.
Remove MSYS and CygWin from your path and try again.
Gé van Geldorp.