The Heirloom laptop adds some minor extra hardware, such as an internal fan. This package supports this additional hardware.
To build the package, run "git-buildpackage [tag]" where [tag] is a valid upstream tag, such as v1.0. You might also need to add -uc -us if building an unsigned package. E.g.:
git-buildpackage -us -uc --git-upstream-tag=v1.0
To install, simply use dpkg to install the resulting .deb package.