This package is intended to enable something like:
dpkg-buildpackage -rfakerooti.e. to remove the need to become root for a package build. This is done by setting LD_PRELOAD to libfakeroot.so, which provides wrappers around getuid, chown, chmod, mknod, stat, and so on, thereby creating a fake root environment.
fakeroot requires SYSV IPC or TCP to operate.