DebWrt Debian Packages
For newer releases of DebWrt, the Debian packages are stored in a central DebWrt Debian package repository. Even though the root filesystem images provided by DebWrt will include most or all of the DebWrt packages, using a central repository allows a much easier update/upgrade path.
Note: some DebWrt packages available in older release have been depricated; those are not available in the DebWrt debian packages repository. Mostly because Debian has the package now available in their repositories.
Install Public key
$ wget -q -O - http://packages.debwrt.net/debwrt/dists/debwrt.key | sudo apt-key add -
Add the following line (substitute RELEASE with sid, stretch, jessie or wheezy, or any newer debian release name) to /etc/apt/sources.list:
deb http://packages.debwrt.net/debwrt RELEASE-debwrt-stable main
$ sudo apt-get update
Install a package
$ sudo apt-get install debwrt-test