C:\>nmake

Microsoft (R) Program Maintenance Utility   Version 1.50
Copyright (c) Microsoft Corp 1988-94. All rights reserved.

mkdir `C:\: Invalid argument at C:/my_perl/perl/lib/ExtUtils/Command.pm li
ne 186
NMAKE : fatal error U1077: 'C:\WINDOWS\system32\cmd.exe' : return code '0xff'
Stop.

C:\>