make install: Files missing from include/compiz/core

'make install' fails to install all required core header files. This of course makes other plugin packages (like libcompizconfig) fail to build.

Here is the first error seen when building libcompizconfig:

-- Configuring done
-- Generating done
-- Build files have been written to: /home/dan/bzr/libcompizconfig/toy/build
[ 7%] Building C object src/CMakeFiles/compizconfig.dir/bindings.c.o
[ 14%] Building CXX object src/CMakeFiles/compizconfig.dir/compiz.cpp.o
In file included from /home/dan/bzr/libcompizconfig/toy/src/compiz.cpp:48:0:
/home/dan/usr/include/compiz/core/core.h:87:25: fatal error: core/global.h: No such file or directory
compilation terminated.
make[2]: *** [src/CMakeFiles/compizconfig.dir/compiz.cpp.o] Error 1
make[1]: *** [src/CMakeFiles/compizconfig.dir/all] Error 2
make: *** [all] Error 2