Error calling proteus under Windows

[filippobottega]

Hello,
when I try to call proteus.exe on Windows I get errors because I'm not able to understand the path format to use to specify -f and -p parameters.
I'm trying to generate proto files for package github.com/SMerrony/tello.
Assume that:

1. current folder is: C:\Users\Filippo\go\src\github.com\SMerrony\tello
2. in tello folder I have created a subfolder named protos
3. $GOPATH is C:\Users\Filippo\go

If I call proteus I get:

• proteus -f .\protos -p github.com/SMerrony/tello
  • error scanning package "github.com/SMerrony/tello": La sintassi del nome del file, della directory o del volume non è corretta.
• proteus -f .\protos -p C:\Users\Filippo\go\src\github.com\SMerrony\tello
  • CreateFile C:\Users\Filippo\go\src\C:\Users\Filippo\go\src\github.com\SMerrony\tello: La sintassi del nome del file, della directory o del volume non è corretta.

How can I solve this issue on Windows?

Regards,
Filippo.