Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: ftdi-0.3.0.2 (user goal)
[__1] trying: usb-1.3.0.6 (dependency of ftdi)
[__2] next goal: bindings-libusb (dependency of usb)
[__2] rejecting: bindings-libusb-1.4.5.0 (conflict: pkg-config package
libusb-1.0==1.0.16 || >1.0.16, not found in the pkg-config database)
[__2] rejecting: bindings-libusb-1.4.4.1 (conflict: usb =>
bindings-libusb>=1.4.5)
[__2] skipping: bindings-libusb-1.4.4, bindings-libusb-1.4.2,
bindings-libusb-1.4, bindings-libusb-1.3, bindings-libusb-1.2,
bindings-libusb-1.1, bindings-libusb-1.0, bindings-libusb-0.0.7,
bindings-libusb-0.0.6, bindings-libusb-0.0.5, bindings-libusb-0.0.4,
bindings-libusb-0.0.3, bindings-libusb-0.0.2, bindings-libusb-0.0.1 (has the
same characteristics that caused the previous version to fail: excluded by
constraint '>=1.4.5' from 'usb')
[__2] fail (backjumping, conflict set: bindings-libusb, usb)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: usb, ftdi, bindings-libusb