pkgin failed to install

[Daniel Feenberg <feenberg%nber.org@localhost>]

Is

  http://ftp.NetBSD.org/pub/pkgsrc/pakages/NetBSD/amd64/6.1.5/All/

supposed to be empty? Is that why pkgin doesn't work in my new install of 
NetBSD? That is the default (and documented) source for binary 
packages on the configuration screen for NetBSD 6.1.5 during the 
installation. When I attempt to turn on binary installs, I get the 
message:

  Failed possibly because no binary packages exist.

While I have lots of experience with FreeBSD, this is my introduction to 
NetBSD, and I am unable to install binary packages. Can anyone help?

daniel feenberg