Windows path not supported

[yanni4night]

It crashed on Windows when meeting path like:

{ [Error: Unable to create directory "D:\Workspace\web-lyk-test\static\js\D:" (Error code: ENOENT).]
origError:
{ [Error: ENOENT, no such file or directory 'D:\Workspace\web-lyk-test\static\js\D:']
 errno: 34,
 code: 'ENOENT',
 path: 'D:\\Workspace\\web-lyk-test\\static\\js\\D:',
 syscall: 'mkdir' } }