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@@ -5,4 +5,11 @@ For a more complete binding, have a look at the more complete and more advanced
 I wrote this alternate binding:
 
 - in order to experiment more in depth with Ctypes;
-- and because I needed something more portable than ocaml-usb: this one is working on Windows, which was not the case of ocaml-usb when I started this project.
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+- and because I needed something more portable than ocaml-usb: this one is working on Windows, which was not the case of ocaml-usb when I started this project.
+
+# Dependency
+
+Obviously, `libusb` must installed before compilation. `pkg-config` is used in order to locate the library during compilation.
+
+On Debian-like systems: `apt install libusb-1.0-0-dev`
+On cygwin, I used mingw64 OCaml installation. This is why I installed `mingw64-x86_64-libusb1.0` package.
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