Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\alex>perl -MFile::Spec -E "say File::Spec->isa('File::Spec::Win32')"
1

C:\Users\alex>perl -MFile::Spec -E "say File::Spec->isa('File::Spec::Unix')"
1

C:\Users\alex>