Knot 1.5 alpha cannot bind to some interfaces

I've just built Knot 1.5 alpha from Marek's tarball, and ran it on a non-production server. On this server, I have an ethernet interface, and a dummy interface. Knot starts, and binds to the IP address on the ethernet interface (10.64.0.11), but fails to bind to the addresses on the dummy interface (193.0.9.1, 193.0.9.2, 2001:67c:e0::1 and 2001:67c:e0::2):

2014-04-07T11:40:18 Knot DNS 1.5.0-alpha starting. 2014-04-07T11:40:18 Binding to interface 10.64.0.11@65353. 2014-04-07T11:40:18 Binding to interface 193.0.9.1@53. 2014-04-07T11:40:18 [error] Cannot bind to address '193.0.9.1@53': Operation not permitted. 2014-04-07T11:40:18 Binding to interface 2001:67c:e0::1@53. 2014-04-07T11:40:18 [error] Cannot bind to address '2001:67c:e0::1@53': Operation not permitted. 2014-04-07T11:40:18 Binding to interface 193.0.9.2@53. 2014-04-07T11:40:18 [error] Cannot bind to address '193.0.9.2@53': Operation not permitted. 2014-04-07T11:40:18 Binding to interface 2001:67c:e0::2@53. 2014-04-07T11:40:18 [error] Cannot bind to address '2001:67c:e0::2@53': Operation not permitted.