lb build failing

[Kent Tenney <ktenney@gmail.com>]

Howdy,

host is Ubuntu 14.04

using git clones, debian-next,
$ sudo make install
from live-build, live-boot, live-config, live-tools

$ sudo lb config -d trusty
$ sudo lb build
... lots of package stuff

ends with

[2015-02-18 13:19:52] lb binary_syslinux
P: Begin installing syslinux...
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package isolinux
P: Begin unmounting filesystems...
P: Saving caches...
Reading package lists... Done
Building dependency tree
Reading state information... Done

My guess that
$ sudo aptitude install syslinux
would fix it, was wrong.

Suggestions?

Thanks,
Kent