Comment 1 for bug 1618714

This seems to be related to missed C headers files:

 02:26:37 netifaces.c: In function 'gateways':
 02:26:37 netifaces.c:1704:22: error: 'RTNL_FAMILY_MAX' undeclared (first use in this function)

That's probably rtnetlink.h:

http://lxr.free-electrons.com/source/include/uapi/linux/rtnetlink.h#L15