You can always download the source package, compare the source with the original distributed source, all it takes is a simple diff, and then build your own package out of it.
Last time I tried, I had compilation errors.
I've just tried again, I get:
$ uname -a
Linux aptosidbox 2.6.38-1.slh.4-aptosid-686 #1 SMP PREEMPT Sat Mar 26 13:12:20 UTC 2011 i686 GNU/Linux
$ make -
Err, this isn't how you should build a debian source package.
You should have downloaded the source package. First you need to make sure you have apt-src lines in /etc/apt/sources.list, and then you can simply do:
$ apt-get source bitcoind
Then you need to make sure you have the proper build-dependencies installed:
$ sudo apt-get build-dep bitcoind
Then while in the directory you can do the following to build the package:
$ dpkg-buildpackage -us -uc
EDIT: fixed code block formatting