Quoting: MArKiToI'm on Ubuntu 18.04 and trying to get this to work.
I cloned the Git repo in my home folder. Then I'm following installation instructions. I suppose I have to go into the xow directory I cloned from Git and type:
make BUILD=RELEASE

Then I got the following error:
g++  -Wall -Wpedantic -std=c++11 -MMD -O3 -DCHANNEL=1 -DVERSION=\"v0.4\" -c -o xow.o xow.cpp
In file included from xow.cpp:20:0:
dongle/usb.h:28:10: fatal error: libusb-1.0/libusb.h: No such file or directory
 #include <libusb-1.0/libusb.h>
          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Makefile:30: recipe for target 'xow.o' failed
make: *** [xow.o] Error 1

libusb library is installed on my machine, so I don't understand. Can someone help/explain/give me a hint to get past this error please?