Zen Garden is a tool that watches over the installation and building of source archives. It is a fork of installwatch that has been heavily updated with modern features. It can prevent build tools from interfering with files outside the build directory and create a virtual chroot to perform installations in or backup the files the install overwrites.
The Zen Garden application is a simulation of a desktop zen garden. The user can drag sand around stones with a rake. The project homepage contains a demonstration applet. Enjoy!