The tee backend has to be enabled with --enable-tee now.
This has been fixed by commit d51ab091422fc64831578bffb3a502c83ec8bdf5 Author: Andrea Canciani <ranma42@gmail.com> Date: Sat Nov 6 15:46:48 2010 +0100 configure: Correct reporting of tee backend Since 9f33f8453b4949cfdc63169d3acd7238f89379c2 tee is not compiled in anymore by default. Reporting it as always enabled is misleading.
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