Comment 1 for bug 835968

Also, without specifying --prefix the data files are installed into /usr but the executable continues to refer to /usr/local:

Traceback (most recent call last):
  File "/usr/bin/udev-discover", line 562, in <module>
    UDevDiscoverGUI()
  File "/usr/bin/udev-discover", line 228, in __init__
    'main_window']):
  File "/usr/lib/python2.7/site-packages/gi/types.py", line 44, in function
    return info.invoke(*args)
glib.GError: Failed to open file '/usr/local/share/udev-discover/udev-discover.ui': No such file or directory