Known issues

The fakeroot environment is imposed upon a process by using the C-library's LD_PRELOAD
environment variable. libfakeroot is preloaded by the dynamic linker whenever it loads
a binary.  This means that fakeroot does not work with statically linked binaries.

There is also another side-effect. Since libfakeroot is loaded into the same process
image with the "victim" program, they share the same file descriptor table.
Some programs (such as the configure scripts) use hard-coded descriptor numbers.
libfakeroot needs one file descriptor for its communication socket, and if the program
starts to use the same file descriptor, there will be trouble.

fakeroot tries to monitor the status of its descriptor so that it can open a new socket
if the descriptor has been changed. If you start seeing messages about hijacked file
descriptors, you can try to make fakeroot use some other file descriptor with the
  --fd-base option.
Its default value is (descriptor_table_size - 100).