Try specifying "libusb-0.1-4" rather than "libusb".
Upstream http://www.libusb.org/ gives some background for that naming convention [it should be possible to install the "legacy" libusb-0.1-4 and "stable" libusb-1.0-0 concurrently if you ever need to], though why the "-4" became codified is beyond me at the moment. :)
@Cesare Mastroianni:
Try specifying "libusb-0.1-4" rather than "libusb".
Upstream http:// www.libusb. org/ gives some background for that naming convention [it should be possible to install the "legacy" libusb-0.1-4 and "stable" libusb-1.0-0 concurrently if you ever need to], though why the "-4" became codified is beyond me at the moment. :)