> I also vaguely recall some actions which work as an ordinary > user but fail under fakeroot; due to a difference in behaviour. I no > longer can recall the details, though, so I could be mistaken. The bzr test suite, for one.
Or libslepc2.3.2 configure refuses to configure tha package under fakeroot, so one must use: dpkg-buildpackage -rfakeroot Ondrej