problem updating udev

[Richard B. Pyne]

Even after installing libusb I get:

checking for acl/libacl.h... yes
checking for LIBUSB... configure: error: Package requirements (libusb >= 
0.1.12) were not met:

No package 'libusb' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables LIBUSB_CFLAGS
and LIBUSB_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

Creating /var/log/lunar/compile/udev-151.bz2
! Problem detected during BUILD